Democratic Sentinel, Volume 17, Number 42, Rensselaer, Jasper County, 3 November 1893 — Two Colors of Tobacco Smoke. [ARTICLE]

Two Colors of Tobacco Smoke.

Smoke consist* of minute particles of solid or liquid matter suspended in the air, and its color depends partly upon the chemical constitution of suoh particles, but also largely upon their size. Exact experiment has shown that as the size of minute partioles suspended in air is gradually increased they give rise to colors varying from sky-blue down through the whole range of the spectra) scale. This is the cause of sunset and sunrise colors in the sky. Its effects can also be traced in the case of the two kinds of tobacco smoko, i modified by the murky tints of 1 the carbonaceous products. The smoke given off from the heated surface of the burning tobacco in the bowl of the pipe consists of matter all of which has been highly heated and very fully oxidized and decomposed. It consists mainly cf exceedingly small solid particles, exhibiting by virtue of their amalloess a bluish color. On the other hand, that smoko which has been drawn through the tobacco into the mouth of the a oker carries with it a relatively targe quantity of water and hydrocarbon, which ate condensed upon the solid particles above mentioned. The relatively large size of such particles explains the well-known grayish color of the smoke which issues from the mouth of the smoker.—[TidBita.