Handy man's workshop and laboratory . Fig. 184—Pouring invisible vapor of carbon disulphide downa trough and into a glass two liquids be placed with some care side by side in one vessel,the adhesion of glycerin for glass wiil keep them in that queerposition. Take an ordinary glass, and divide its capacity into two halvesby means of a roughly-cut pasteboard partition laid vertically inthe glass. Pour at the same time glycerin on one side of thepartition and carbon disulphide on the other. If, while so doing,you are careful not to allow too great a difference of level betweenboth liquids, each w
Handy man's workshop and laboratory . Fig. 184—Pouring invisible vapor of carbon disulphide downa trough and into a glass two liquids be placed with some care side by side in one vessel,the adhesion of glycerin for glass wiil keep them in that queerposition. Take an ordinary glass, and divide its capacity into two halvesby means of a roughly-cut pasteboard partition laid vertically inthe glass. Pour at the same time glycerin on one side of thepartition and carbon disulphide on the other. If, while so doing,you are careful not to allow too great a difference of level betweenboth liquids, each will stay on its own side of the partition, everi HANDY MAN S WORKSHOP AND LABORATORY 209 though the latter may imperfectly fit the glass. Now raise thepartition. The surface of separation of the two liquids sometimesremains perfectly vertical for several minutes. More frequently,. Fig. 185—Carbon disulphide and glycerin side by side under the influence of the three factors which determine its shape,i. e., adhesion, cohesion, and a small difference in density, it bendsitself and becomes more or less S shaped. While handling carbon disulphide, one should always bear in 210 HANDY MAN S WORKSHOP AND LABORATORY mind that this liquid takes fire even more readily than gasoline,and that its vapor is poisonous. The latter inconvenience is thelesser, because the nature and intensity of the smell of the com-mercial product are such as to cause one to step back when thevapor reaches the nostrils.—58 BLUE ROSES The roses shown on the accompanying figure are white with adelicate and beautiful network of blue veins. Such roses can be
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