A. For the base jack one part alcohol, two parts water; for the horizontal jack one part alcohol, one part water, and for both add a tablespoonful of sperm-oil.
A. The cylinder, ram, reservoir, socket, knuckle, piston, piston-valve, pump, pump-valve, lowering-valve, packing-springs, etc. (See Figs. 52 and 53.)
Q. How can a weight be raised when the jack will not go under the weight?
Q. Give some general instructions for the care and use of the jack.
A. Never fill with water, kerosene, or wood-alcohol. Keep the ram down when not in use. If the valve sticks on its seat, strike the lever a few sharp blows up and down, thus jarring the valve. Use the alcohol supplied by the Ord. Dept.
Base jacks should never be used so that the head is lower than the foot. A jack should be used once a week to keep the packing in order.
Never apply more than 150 pounds to the lever: this equals about the weight of the average man.
Q. Point out the following parts of the Model 1903, Cal. 30 magazine rifle:
Barrel, Stock, Butt, Bayonet, Bolt, Trigger, Sights, Guard, Cut Off, Sleeve, Sleeve Lock, Stacking Swivel, Extractor, Ejector, Windage Screw, Firing Pin, Cocking Piece, Main Spring, Follower, Hand Guard, Drift Slide, Striker.
Q. Point out the following parts of the Ball Cartridge:
A. It is the diameter of the bore in inches.
Q. What is the weight of the rifle and bayonet?
Q. What is the maximum ordinate at 1000 yards?
Q. What is the weight of charge of powder?
Q. How many cartridges will the magazine hold?
[Illustration: FIG. 54. U. S. MAGAZINE RIFLE, MODEL 1903.]
[Illustration: FIG. 55. U. S. MAGAZINE RIFLE, CALIBER 30, 1903.]
[Illustration: FIG. 56. CALIBER 30 BALL CARTRIDGE.]
A. To clean the barrel, insert in the chamber a cartridge shell, the front end of which has been filled with a wooden plug, and close the bolt. Clean the bore with a rag saturated with soda water, or if this is not obtainable, with water. Wipe dry with clean rags. Remove the bolt and the cartridge shell, clean and dry the chamber from the rear. Thoroughly oil the chamber and the bore with a light coat of cosmoline oil. The stock and hand guard may be coated with raw linseed oil and polished by rubbing with the hand.
A. In cases where the great range of the service bullet would endanger persons or property at a considerable distance from firing.