The Arizona sentinel., 1885-07-11
Popular Science.

| mcOtCdt pIdClltlOucI1 0ctltOuS
 trates in 6 paper to the Academy
 that the continual use of nor lphine results in the loss of the
 teeth and hair of those SO using l 1t.
 It Is the theory of the medical
 men who believe cholera to be
 caused by a bacillus which poison
 food and water, that the germ
 may be killed by heat, and they
 recommend that all water should
 be boiled and all food cooked be-
 fore it Is drunk or eaten.
 An almost perfect skeleton oi
 the mosasaurus has just been
 found in a quarry near Mons. II
 has the extraordinary length oi flfty>five feet nine inches, and
 will be preserved at the Natural
 History Museum at Brussels.
 According 10 8 French patent,
 the passage of 8 suitable electric current through milk causes the
 rapid separation of the butter, and renders churning unnecessa- ". The manufacture of cheese and the removal Of rancidiiy from butter by electrical aid are also claimed.
 Experienced lumbermen have always held that timber cut in the spring was not durable for building purposes. Recent scien. tific investigations sustain this belief. It Is shown that the rich CT the wood is in phosphoric acid and potassium the more likely II is to ret and mold; wood cut in the spring contains eight times IS much of the latter as when cut In the winter.
 To test the enamel or timing of cooking vessels, etc. for lead, NJ. FOrdOs recommends a drop of strong nitric acid placed on the enamel Or timing, and evspOrai- ed to dryness by gentle heat. The spot where the action of the acid has taken place is then wet ted by a drop of solution of potas. sium iodide-5 parts iodide to 100 of water-when the presence of the lead is at once shown by the formation of yellow lead iodide.
 A new street-car motor made trial trip on specially construct ed track, in the yards of the Cooper's Point Iron Works of Camden, Penn., recently. The motor is operated by means of gas engine Of 20-horse power. Among the original features of the motor are the automatic feet, which act entirely upon the prin- ciple of the action in a horses front legs. They are beneath and extend to the center of the mo. tor, and are to be used at grades and slippery places, where the wheels slide. The feet push the | motor along.
 One of the most adhesive and l durable of cements known to mechanics who essay to unite | iron surfaces is the oxide of iron l itself. With this a joint can be | made so perfect and sound that | the iron will break before the ce> ment will part. In removing the | cast-irOn pipe of bilge pump from a ship that had made four voyages 1t was necessary | 10 take the sections apart. The Ranges had been pasted with a cement of cast-iron drillings and filings, mixed with sulphur and Sal ammoniac, moistened with water. Then the nuts-three In each fiange-were set up on the bolts and the union was com pleted. The four vayages-gOing and re;urniDg-occupied nearly year. When the separation Of he parts was attempted, even lhe cold chisel was unable to make division between the sos lid castings and the intervening The sulphur and the salts are simply means to more rapidly oxidize inc iron drillings and fiiings-the iron rust is really the cement. If time is allowed, ordinary water, pr salt water would act ss sol-