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The public reporting burd en tor this c:ollect1on of information 1s estimated to average I hour per re.sponse, 1nclud1 nQ the nme for reviewing 1ns!tuctions, searQ111ng existing data sources, gathering and maintaining the date needed. and co mpletlng and revtewing the oollection of 1nfonmauon Send co mm'l"nls regarding this burden esU mate or any other aspect of this co11ect1on of inforrnatlon , mcluding sugges ti ons for reducing the burden, to the Department of Defense, Executive Service Directorate (0704--0188). R espondents should be aware that notwith standing any oiher provisictn of law, no ~erso n shall be subject to any penalty for failing to cornp1v With a collection of in formation 1f11 does not display a currently valid OMB co ntrol number

Horses played a vital role in the economy of pre-industrial England. They acted as draught animals, pulled ploughs, waggons and coaches, worked machines, and transported goods around the country. As saddle animals they enabled their riders to carry out a wide variety of tasks, and at all levels of society they were regarded as status symbols in a unique relationship with man shared by no other animal. During the Tudor and Stuart period, horses were needed in ever-growing numbers, and for a greater variety of tasks. As demand grew, improvements became necessary in the means of supply and distribution. The agents of change, the specialist dealers, were often condemned as rogues and cheats, whose actions raised prices and caused shortages. Dr Edwards argues that, far from being generally unscrupulous, the dealers were no better or worse than those amongst whom they lived and worked.

The Space Shuttle Reaction Control System design requirements, regimes of operation, and physical characteristics are described to show how they influenced the subsystem design. An overall RCS description and discussion of several components including the thruster, propellant tank, AC propellant isolation valves, and burst disc pressure relief valve assembly are presented. The current status of the Forward Reaction Control System development tests at the NASA-White Sands Test Facility are discussed including test results and unique developments encountered as a part of the test program.

No abstract