THE ASH OB PLANTS. 163 



The following table includes both the kernel and straw 

 of Wheat, Eye, Barley, Oats, Maize, Eice, Buckwheat, 

 Beans, and Peas ; the tubers of Potatoes ; the roots and 

 tops of Sugar-Beets, Field-Beets, Carrots, Turnips, and 

 various parts of the Cotton Plant. 



For the average composition of other plants and vege- 

 table products, the reader is referj-ed to a table in the ap- 

 pendix, p. 409, compiled by Prof. Wolff, of the Koyal 

 Agricultural Academy of Wiirtemberg. That table in- 

 cludes also the averages obtained by Prof. WolfE for most 

 of the substances, cotton excepted, whose composition is 

 represented in the pages immediately following. 



In both tables the carbonic acid, 00^, which occurs in 

 most ashes, is excluded, from the fact that its quantity 

 varies according to the temperature at which the ash is 

 prepared. 



The following is a statement of the various Names and 

 Symbols that are or have been currently applied to the 

 Ash-Ingredients in Chemical Literature. The changes 

 that have been made from time to time, both in symbols 

 and in names, are the results of progress in knowledge or 

 of attempts to improve nomenclature : 



Swnonj/ms. 

 Potash, Potassa, Potassium Oxide, Potasslo Oxide. 

 Soda, Sodium Oxide, Sodic Oxide. 

 Magnesia, Magnesium Oxide, Magneslc Oxide. 

 Lime, Calcium Oxide, Calcic Oxide. 

 Iron Oxide, Peroxide of Iron, Sesquioxide of Iron, 

 Ferric Oxide. 



PO5 PjOj Phosphoric Acid, Anhydrous Phosphoric Add, 



Phosphoric Anhydide, Phosphorus Pentox- 

 ide. Phosphoric Oxide. 

 SO3 SO, Sulphuric Acid, Anhydrous Sulphuric Acid, Sul- 



phuric Anhydride, Sulphur Trloxlde, SiU- 

 phnrio Oxide. 

 SiOs SiOj Silicic Acid, Anhydrous Silicic Acid, Silicic An- 



hydride, Silicon Dioxide, Silicic Oxide, Silica 

 Silex. 

 CO, COj Carbonic Acid, Anhydrous Carhonlc Acid, Car- 



bonic Anhydride, Carbon Dioxide, Carbonic 

 Dioxide. 



