Analysis of a course of lectures on natural and experimental philosophy : viz. 1. Properties of matter, 2. Mechanics, 3. Chemistry, 4 and 5. Pneumatics, 6. Hydrostatics, 7. Electricity, 8. Electricity [sic], 9. Optics, 10. Use of the globes, &c., 11 and 12. Astronomy / by A. Walker.

  • Walker, A. (Adam), 1730 or 1731-1821.
Date:
[1795?]
Catalogue details

Licence: Public Domain Mark

Credit: Analysis of a course of lectures on natural and experimental philosophy : viz. 1. Properties of matter, 2. Mechanics, 3. Chemistry, 4 and 5. Pneumatics, 6. Hydrostatics, 7. Electricity, 8. Electricity [sic], 9. Optics, 10. Use of the globes, &c., 11 and 12. Astronomy / by A. Walker. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    18/88 (page 18)
    [ >8 ] hence the fmaller the gudgeon or axle of a wheel the better, if it has but ftrength to fupport the weight. The fridtion in water that carries an undcr-fhot mill, is much taken olF by a hoping pedal; the velocity of the flat-boards of the wheel ought to be one-third of the velocity of the water; the number of flavcs in the trun- dle ought to be no even part of the number of cogs in the wheel that turns it; and the grinding ftone fliould not make above 6o revolutions in a minute. Befides the mechanic powers, and various inftruments to explain fri^ion, momentum, falling bodies, &c. the machines ufed to illuftrate this lefture are, ift. A move- able crane, ad. A mill to faw marble. 3d.* Ditto to faw timber. 4th. A common pile-driver. 5th. Voulou’s pile-driver. 6th. The equitable moving wind-mill, that deaths, uncloaths, and turns itfelf to the wind. 7th. Drill-ploughs. 8th. Ventilators. 9th. Wheel carriages. 10. Methods ufed in moving the great ftone on which the ftatue of Peter the Great is ereded in Peterfburg. nth. A compleat fortification. 12th. Boulton, Blakey, Smeaton’s and the common fire or fteam engines. 13th. Water engines of all denominations, viz. common pumps, forcing pumps, rope pumps, Archimedes’s ferew pump ; bucket-engines, machines for draining, embank- ing, ^>cc. &c. &c. Thefe, and many more, from their fize, cannot be removed from the Winter Ledure Room, now in George Street, Hanover Square.