Tobacco culture : prize essays . ivedoses, it produces nausea, vomiting, spasms, and con-vulsions, which often terminate in death. Chemical Properties.—An analysis of the ashesof tobacco, by Professor Johnston, shows the follow-ing constituents in their several proportions per cent: Pot-Ash, 12-14 Soda, OOT Lime, 45-90 Magnesia, 13-09 Chloride of sodium, 8-49 Chloride of potassium, 8-98 Phosphate of iron, 5-4S Phosphate of lime, 1-49 Sulphateof lime, 6-85 SiUcia, 801 100-no From the above analysis, it will be observed that otthe mineral matters contained in tobacco the followingpredominate: si
Tobacco culture : prize essays . ivedoses, it produces nausea, vomiting, spasms, and con-vulsions, which often terminate in death. Chemical Properties.—An analysis of the ashesof tobacco, by Professor Johnston, shows the follow-ing constituents in their several proportions per cent: Pot-Ash, 12-14 Soda, OOT Lime, 45-90 Magnesia, 13-09 Chloride of sodium, 8-49 Chloride of potassium, 8-98 Phosphate of iron, 5-4S Phosphate of lime, 1-49 Sulphateof lime, 6-85 SiUcia, 801 100-no From the above analysis, it will be observed that otthe mineral matters contained in tobacco the followingpredominate: silicia, potash, lime, and magnesia, witha large proportion of the phosphate of iron and sul-phate of lime. There is in tobacco a volatile alkali,which may be known by its smoke changing the colorof flowers — turning red to purple, aud purple togreen. DifiFirent kinds of tobacco are distinguishedby the peculiar odor emitted: this variation is iupart due to the different modes of curing the leaf. 48 HOW TO EAISE TOBACCO. /; J^o. THE TOBACCO WORM. (From the American Agricultukist for April, 1863.) The above engraving represents one of our mostT Gracious and destructive insects. It is sbown in itsdifferent stages of larva, chrysalis, and imago, or larva or worm, fig. 1, is a great pest upon potatoand tomato vines, and upon tobacco. It is especiallyinjurious to the latter crop, as it perforates the leavesand renders them ragged and worthless. The wormas it comes from the egg is so small as to be unob-served, but having an enormous appetite, it devoursrapidly, and soon grows to about twice the size repre-sented in the cut. When not feeding, it lifts up thehead and fore-part of the body, and remains apparent-ly lifeless. From its resemblance in this position tothe Egyptian Sphinx, Linnceus gave the name Sphinzto the genus. The larva is of a light green color, withwhitish oblique stripes, and has a horn upon the rearend of the body. Though it is repulsive in appearance,it i
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Keywords: ., bookcentury1800, bookdecade1860, booksubjecttobacco, bookyear1865
