Page:Popular Science Monthly Volume 91.djvu/472

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��Popular Science Monthly

��Bath Water Supply System for an Army Camp

��WHEN the cold days of early winter set in the army boys on the Border began devising ways and means of heating water for the bath. In many camps differ- ent devices were

_ TROM COILTO BOILER '52 GALLON BARREL

��ordinary reamer for metal. Not only is this true, but the construction of a reamer prohibits it from even starting in a hole any smaller, as the end is only 1/64 in. smaller than the final size.

Reamers do not cut oversize. Thus, if a

hole is reamed to % in. and a shaft is

tight in it, the

��to be seen, but the one that ap- pealed to me most was a bar- rel used as a tank, with a coil of pipe connected with it for a water heater. The barrel was placed on a table to make its lower end considerably above the fur- nace top. A pipe was led from the bottom of

���• TO COIL f ROM BARREL '

A range boiler and a barrel with pipe connections for heating water from an incinerator fire to supply hot water for baths

��the barrel down to a tee joint, then horizon- tally to the end of the furnace, where another tee was used to make connections for the coil in the furnace fireplace. The opposite end of the pipe-coil was connected with the pipe system from the top end of a range boiler set on another small table to bring its lower end above the fireplace coil. The barrel supplied the water to the tank as it was drawn out through the faucet. The furnace in this case was the incinerator, which was kept burning at all times. Con- sequently there was hot water ready for shaving and washing, as long as the barrel was kept filled. This is a simple way of solving a hard problem and can be readily adapted for use in small camps.— George M. Petersen.

��in

opening cannot be enlarged a tri- fle, or "reamed out a little so that the shaft is loose." Stock reamers are made in sizes varying by sixteenths. Any size between must be made to order. Expansion reamers are not made in sizes un- der % in. The reason for this construction is to allow the teeth to be sharpened and "set out" again to the original size. They are seldom found in small shops and do not enter into the case in the every day re- quest to "ream it out a little."

Remember a hole can be enlarged not more than 1/64 in. by a reamer and not even that much unless the hole happens to be that 1/64-in. under a standard size in sixteenths.

��The Right Meaning of the Term Reaming

EVERY machinist knows what it is to be asked to "ream" out a hole a little larger, — "little" varying from a few thousandths of an inch to 3^2 i n - As a matter of fact the lay public knows very little about reaming. The truth is this: Holes for reaming are drilled from .003 to 1/64 in. smaller than the final size. Then a reamer is used to bring the hole up to the exact size, round and true, which cannot be obtained with a drill alone. More than this amount cannot be taken out with any

��A Handy Method of Sending Small Coin by Mail •

A SAFE and handy method of inclosing small coins in letters, if you do not happen to have the regular coin holder at hand, is to use a piece of corrugated cardboard, such may be found in discarded wrappings, egg-boxes, etc. Simply cut a slit in one side of the corrugated boa rd , push the coin in and press it down flat. Be sure to write on the outside of the cardboard, "Coin in here" or "Money in- side the card," so that the re- ceiver can readily find the coin between the sides. — Albert B. Wegener.

���Corrugated board

��Slitting a corrugated board to hold coin

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