SCIENCE AND INVENTIONS.

Otago Witness, Issue 3352, 12 June 1918, Page 55

SCIENCE AND INVENTIONS.

«&—. C. J. Lynde, Macrlonald College, Quebec, Canada. SPARK PLUG TESTER. This tester is made of two strips of metal attached to two thicknesses of emery cloth glued hack to back. The

metal strips serve to test the spark plugs and the emery cloth to clean them.— David L. Winters, Philadelphia, Penn. (U.S. Patent, 1,252,639). MARKER FOR CORN PLANTER. The marker attachment here has two swinging side arms connected with by a rope in front. It marks on either

side, and when one arm is in use the other is folded along the side.—Ralph W. E. Hayes, Galva, 111. (U.S. Patent, 1,255,532). ROAD DRAG. This simple drag consists of a number of wooden bars bolted loosely together in such a way that it discharges to the

Road Brag right:or left according to the way the chain is connected in - front. —Joseph S-. Olsen, Henriette, Minn. (U.S. Patent, 1,226,801). HOG HOUSES. There are two general types of hog houses recommended by progressive hog raisers; the small portable type and the large stationary type with individual pens. We illustrate three models of the

stationary type. The six-sided house is made of nothing heavier than 2in x 4in stock. It has 12 pens, well lighted, and a large central space for food storage. It is described in a bulletin on "Hog Houses," issued by the National Lumber

Manufacturers Association, Chicago. The semi-monitor house is designed, built, and used by the Illinois Experiment Station. Its -windows face south and give light to

tlie pens on both sides. It is said to be very convenient. The semi-monitor house shown with its outside yards is described in Bulletin 438, I'Hog Houses," U.S.

Dept. of Agriculture. It has an outside pen for each inside pen except one, and none of they are on the north. It is used by many large hog breeders in Nebraska.