The contents of a cylindrical can or paint pail can be determined: Measure circumference with a tape. “ height “ “ “ Diameter of can equals ⁷⁄₂₂ of circumference. Subtract from circumference a slight amount for thickness of can. Multiply the result by itself and the product of ¹¹⁄₁₄. This result should be multiplied by height of can less proper allowance for inset and thickness of ends. The result (if you have used inches) will be the cubic contents (in inches,) it can be reduced to gallons or fraction of a gallon by dividing by 231. These precautions are only a few in the course of home buying. But we hope they will be suggestive. Know your state laws. No home should be--no matter what its scale--without a scale, a liquid, as well as a dry set of measure. It is wisest to buy and sell by weight as the heaping systems vary. It is fairest to customer and more comfortable to merchant. If you and every one insist on this fashion--it will prevail in the future. ADDITION AND RECAPITULATION Finally we have added to our familiar weights, measures, thermometers and scales--the hydrometer for candy making, preserves etc., the water meter which you don’t realize is working away in your home, the electric meter which silently subtracts coin from your pocket too, the gas meter which is just as financially obstreperous and if you are inquisitive meteorologically you may too have a barometer to tell the atmospheric pressure and presage the weather and the hygroscope or psychrometer which will measure the humidity in the air. These things are the measures which will take the “uncertain” out of your domestic sailing and be an all encompassing compass for all your goings, comings, and weighs. But above all don’t forget the egg timer--or the clock for without these two things marriage can be a brittle thing and homekeeping an anarchy. CHAPTER XLI TAKING THE KITCHEN ALONG It is no longer necessary for motorists to trust to luck and the roadhouse restaurant for lunch. They can take their own kitchen along and loiter down the highways and byways and eat where and when they will. Manufacturers who have studied the requirements of motorists provide the neatest imaginable bits of equipment for use on the road. With them you can be as comfortable in the Gobi Desert as at home. The best known of these pieces is what is called the “Restaurant,” a ship-shaped glazed duck or sole leather case equipped with knives, forks, spoons, cups, saucers, butter jars, sandwich boxes, vacuum bottles, salt and pepper shakers and napkins, for from two to eight persons. They can be strapped on the running board or back rack of the car or slid unobstructively into the tonneau. They are shaped usually like suit cases, although one firm makes them in a flat, square shape of sole leather, black grain leather or glazed duck (patent leather).