Scientific.

Waikato Times, Volume XXVII, Issue 2182, 3 July 1886, Page 2 (Supplement)

Scientific.

To Rkmovk iMt.— lii order to take away ink spots from paper it is customary to use :i blotter, which freely sinks up the liquid, and if by this means all traces of fche ink do not disappear, recourse is had to a salt or some substance having the property of bloeching paper, for instance, oxolate of potassium, etc., to attain this end. A simple modification of this renders sti'l better services. Take a thick blotting pa-->e.' or hoard, st^ep it several times in a solution of oxalic acid <>r oxalatc of potassium. Then dry .it. If there is a spot to ho taken away, apply the blotter which has been prepared in this fashion to the same. In proceeding thus the ink is entirely removed. Thei blotter drinks up tho ink, and whitens the paper at the same time. Froze* Watbb. — There &eems,to be a prevaleut that water becomes purified by (freezing. This is erroneous, and it will be well for the, public to become acquainted with that fact " That water is purified .by freezing, " Dr. Eds>on said," is an old .theory long a^o exploded by j-cientifio research. A.nd it is equallj* true that tempeiatuie as low as twenty degrees below zero does not affect the vitality of typhoi li fever germs." AClbansing RkcipE. — Petroleum jelly serves co clean aud take away all traces of dirt from the hands' .after work-in the shop or laboratory. 'For that purpose* you need; only rub the hands with a small amount of the jelly, which, when penetrating iota the pores of the skin, incorporates itself with the greasy matters .which are there Wassh them with warm water and I ua-* tile soap, and the hands .become cleansed and softened. SiMi'Lis Chrk for Dysentery. —A correspondent of the St. Louis Medioal Journal writes that in 1830, while pr.ictiohiir in Midison County, Illinois, I was induced by the representations of an old lady to make the trial in dy>entery and di-irrhcoi of tabl^spoonful do-*es of pure cider vinegar, i with the addition of sufficient salt to •be notiopablo, aud it acted M) eh irmin-jfly that I h iv» never u>-ed anything <4-e. Nubsing Babies. — How often should a baby be allowed to nui-se durinar the night? For the fiist; thre<» or four months thchild may demand one meal during the night; but! do uot allow a healthy babe the breast oftener than once between 9p. M. and 6. A. M. After four mouths of agi\ not it all b 'tween 10 p m and 5 a. at. — Prioplt!d ciealr.h Jounsl. To Clean Silk Hats — When a silk hat become wit,, or, from other ciu-ts, h-is lost its smoothing and glos*, cleanse it carefully from all dust, then with a silk rag apjly yaselim evenly and smooth down with the same i\tg until it 1-, dry, smooth and glossy. This will make your hat look good a* new. To M!end China.— Into a solution of »rum, arabic stir pl.i-.ter of p.iri-. until the mixture a-sumes the consistency of cream, apply with a brush to the broken ed^ps of china and j"in together. In three days the article cannot be broken in the s.ime place. The whiteness of tho cement adds j to its valuo.