1. A fluidic system for monitoring the difference between the frequencies of first and second fluid input pulse trains, said system comprising: clock pulse generator means for providing first and second oppositely phased fluid clock pulse trains, each at the same specified frequency and having no greater than a 50 percent duty cycle, said specified frequency being greater than the maximum frequency of said first and second input pulse trains; first synchronizer means for receiving said first input pulse train and said first clock pulse train and for providing a first synchronized fluid pulse train wherein each pulse corresponds to a respective pulse in said first input pulse train and is time-coincident with a respective clock pulse in said first clock pulse train; second synchronizer means for receiving said second input pulse train and said second clock pulse train and for providing a second synchronized fluid pulse train wherein each pulse corresponds to a respective pulse in said second input pulse train and is time-coincident with a respective clock pulse in said second clock pulse train; slip resOlver means including: first detector means for detecting the occurrence of more than one pulse of said first synchronized pulse train between successive pulses of said second synchronized pulse train; second detector means for detecting the occurrence of more than one pulse of said second synchronized pulse train between successive pulses of said first synchronized pulse train; first output means responsive to pulses detected by said first detector means for providing an up-count pulse for each pulse in excess of one of said first synchronized pulse train occurring between successive pulses of said second synchronized pulse train; second output means responsive to pulses detected by said second detector means for providing a down-count pulse for each pulse in excess of one of said second synchronized pulse train occurring between successive pulses of said first synchronized pulse train; and third output means for providing a count pulse for each up-count pulse and down-count pulse provided by said first and second output means, respectively; and means responsive to said count, up-count, and down-count pulses for integrating the frequency difference between said first and second input pulse trains.

3. In a fluidic system for monitoring the frequency difference between first and second input pulse trains: means for generating first and second oppositely phased fluid clock pulse signals having a frequency greater than the maximum frequency of either of said first and second input pulse trains; synchronizer means responsive to said input pulse trains and clock pulse signals for time synchronizing said input pulse trains said synchronizer means including first means for phase-shifting each pulse of said first input pulse train into time-coincidence with a respective clock pulse in said first clock pulse signal, and second means for phase-shifting each pulse of said second input pulse train into time-coincidence with a respective clock pulse in said second clock pulse signal; first bistable means responsive to each phase-shifted pulse from said first pulse train for assuming a first stable state, and responsive to each phase-shifted pulse from said second pulse train for assuming a second stable state; first fluidic gating means responsive to each phase-shifted pulse from said first pulse train and said first stable state of said first bistable means for providing a fluid output pulse; second fluidic gating means responsive to each phase-shifted pulse from said second pulse train and said second stable state of said first bistable means for providing a fluid output pulse; first delay means for delaying the switching of said first bistable means from one stable state to another in response to each of said phase-shifted pulses for a period of time sufficient to permit said first and second fluidic gating means to provide their respective fluid output pulses or not in response to the state of said first bistable means existing immediately prior to said each of said phase-shifted pulses rather than the state to which said first bistable means is switched in response to said each of said phase-shifted pulses; second bistable means responsive to each fluid output pulse from said first fluidic gating means for assuming a first stable state, and responsive to each fluid output pulse from said second fluidic gating means for assuming a second stable state; third fluidic gating means responsive to each fluid output pulse from said first fluidic gating means and said first stable state of said second bistable means for providing a fluid output pulse; fourth fluidiC gating means responsive to each fluid output pulse from said second fluidic gating means and said second stable state of said second bistable means for providing a fluid output pulse; and second delay means for delaying the switching of said second bistable means from one stable state to another in response to each of said output pulses from said first and second fluidic gating means for a period of time sufficient to permit said third and fourth fluidic gating means to provide their respective fluid output pulses or not in response to the state of said second bistable means existing immediately prior to the said each of said output pulses from said first and second fluidic gating means rather than the state to which said second bistable means is switched in response to said each of said output pulses from said first and second fluidic gating means.

9. A system for monitoring the difference between the frequencies of first and second input pulse trains, said system comprising: timing means for generating periodic signals, said periodic signals defining regular time intervals, said regular time intervals being shorter than the minimum time interval between successive pulses in each input pulse train; first means arranged to receive said first input pulse train and said periodic signals for providing in only a first portion of said regular time intervals a first synchronized pulse train wherein each pulse corresponds to a respective pulse in said first input pulse train; second means arranged to receive said second input pulse train and said periodic signals for providing in only a second portion of said regular time intervals a second synchronized pulse train wherein each pulse corresponds to a respective pulse in said second input pulse train; and slip-resolver means including: detector means for detecting the occurrence of a second aNd subsequent pulses of one of said synchronized pulse trains between two successive pulses of the other of said synchronized pulse trains; and output means responsive to pulses detected by said detector means for providing an output pulse for each detected pulse.

11. A slip-resolver in a fluidic system for monitoring relative frequency variations between first and second fluid pulse trains, said system comprising: first bistable fluidic means responsive to each pulse in said first pulse train for assuming a first stable state and responsive to each pulse in said second pulse train and for assuming a second stable state; fist fluidic gating means responsive to each pulse in said first pulse train occurring while said first bistable fluidic means is in said first stable state for providing a first fluid signal; second fluidic gating means responsive to each pulse in said second pulse train occurring while said first bistable fluidic means is in said second stable state for providing a second fluid signal; second bistable fluidic means responsive to said first fluid signal for assuming a first stable state and responsive to said second fluid signal for assuming a second stable state; third fluidic gating means responsive to occurrence of said first fluid signal while said second bistable fluidic means is in said first stable state for providing an up-count pulse indicating completion of at least one more cycle of said first pulse than of said second pulse train over a determinable period of time; fourth fluidic gating means responsive to occurrence of said second fluid signal while said second bistable fluidic means is in said second stable state for providing a down-count pulse indicating completion of at least one more cycle of said second pulse train than of said first pulse train over a determinable period of time.

13. A fluidic slip-resolver system for monitoring relative frequency variations between first and second input fluid pulse trains, wherein the pulses in said pulse trains each comprise a pulsed interruption of a positive pressure, said slip-resolver system comprising: first and second fluidiC inverter means responsive to the pulsed interruptions in said first and second input pulse trains for providing corresponding first and second trains of positive pressure pulses; a first fluidic flip-flop having first and second input ports and first and second output ports, having a first stable state assumed in response to a positive pressure at said first input port exceeding the pressure at said second input port and in which a positive pressure signal is provided at said first output port while substantially zero pressure is provided at said second output port, and having a second stable state assumed in response to a positive pressure at said second input port exceeding the pressure at said first input port and in which a positive pressure signal is provided at said second output port while substantially zero pressure is provided at said first output port; means for applying said first and second trains of positive pressure pulses to said first and second input ports respectively of said first flip-flop, said means for applying including delay means connected in series between said inverter means and said respective input ports of said first flip-flop for delaying application of said positive pressure pulses to said respective input ports for a predetermined period of time; first and second fluidic NOR gates, each having a pair of input ports and a NOR output port, and in which a positive pressure is provided at said NOR output port only in the absence of a positive pressure at both of said pair of input ports and substantially zero pressure is provided at said NOR output port whenever a positive pressure is applied to either of said pair of input ports; first fluid passage means for interconnecting said output port of said first flip-flop to one of said pair of input ports of said first fluidic NOR gate; means for applying the pulsed interruption of said first input pulse train to the other of said pair of input ports of said first fluidic NOR gate; second fluid passage means for interconnecting first output port of said first flip-flop to one of said pair of input ports of said second fluidic NOR gate; means for applying the pulsed interruption of said second input pulse train to the other of said pair of input ports of said second fluidic NOR gate; wherein said predetermined period of time by which application of pulses of said first flip-flop is delayed is sufficiently great to permit each pulsed interruption of said first and second input pulse train to reach said other of said pair of input ports of said first and second fluidic NOR gates respectively before its corresponding positive pulse provided by said inverter means is applied to a respective input port of said first flip-flop; and wherein a positive pressure appearing at the NOR output passage of said first NOR gate is indicative that the frequency of said first input pulse train is greater than the frequency of said second input pulse train, and a positive pressure appearing at the NOR output passage of said second NOR gate is indicative that the frequency of said second input pulse train is greater than the frequency of said first input pulse train.

15. A fluidic system for monitoring the difference between the frequencies of first and second fluid input pulse trains, said system comprising: timing means for generating periodic signals, said periodic signals defining regular time intervals, said regular time interval being shorter than the time between successive pulses in each input pulse train; first means arranged to receive said first input pulse train and said periodic signals for providing during only the first half portions of said regular time intervals a first synchronized fluid pulse train wherein each pulse corresponds to a respective pulse in said first input pulse train; second means arranged to receive said second input pulse train and said periodic signals for providing during only the second half portions of said regular time intervals a second synchronized fluid pulse train wherein each pulse corresponds to a respective pulse in said second input pulse train; and slip-resolver means including: first detector means for detecting the occurrence of a second and subsequent pulses of said first synchronized pulse train between successive pulses of said second synchronized pulse train; second detector means for detecting the occurrence of a second and subsequent pulses of said second synchronized pulse train between successive pulses of said first synchronized pulse train; first output means for providing a fluid up-count pulse for each pulse detected by said first detector means; and second output means for providing a fluid down-count pulse for each pulse detected by said second detector means.

17. A slip-resolver in a fluidic system for monitoring the difference between two frequencies of first and second fluid pulse trains, said system comprising: first detector means for detecting the occurrence of two and more pulses of said first pulse train between successive pulses of said second pulse train; second detector means for detecting the occurrence of two and more pulses of said second pulse train between successive pulses of said first pulse train; first output means for providing a fluid up-count pulse for each pulse detected by said first detector means; and second output means for providing a fluid down-count pulse for each pulse detected by said second detector means.

18. A fluidic system for monitoring relative frequency variations between first and second input fluid pulse trains, said system comprising: timing means for generating periodic signals defining regular time intervals, said regular time interval being shorter than the minimum time interval between successive pulses in each input pulse train; first means arranged to receive said first input pulse train and said periodic signals for providing during only the first-half portions of said regular time intervals a first synchronized pulse train wherein each pulse corresponds to a respective pulse in said first input pulse train; second means arranged to receive said second input pulse train and said periodic signal for providing during only the second-half portions of said regular time intervals a second synchronized pulse train wherein each pulse corresponds to a respective pulse in said second input pulse train; a bistable fluidic means responsive to each pulse in said first synchronized pulse train for assuming a first stable state and responsive to each pulse of said second synchronized pulse train for assuming a second stable state; first gating means responsive to each pulse of said first synchronized pulse train occurring while said bistable fluidic means is in said first stable state for indicating that the frequency of said first synchronized pulse train is greater than the frequency of said second synchronized pulse train; second gating means responsive to each pulse of said second synchronized pulse train occurring while said bistable fluidic means is in said second stable state for indicating that the frequency of said second synchronized pulse train is greater than the frequency of said first synchronized pulse train; and delay means for delaying assumption of a stable state by said bistable fluidic means in response to each pulse from said synchronized pulse trains for a period of time sufficient to permit said first and second gating means to provide said indications or not in response to the state of said bistable fluidic means immediately prior to occurrence of each synchronized pulse rather than in response to the state assumed by said bistable fluidic means in response to said each synchronized pulse.