172 THE AMERICAN MONTHLY [Oct. 



bundle with soft fiber and a pericyclic arch of lignified 

 cells on its under surface, separated from the upper and 

 lower epidermis by layers of polygonal thick-walled 

 cells, which do not contain chlorophyll (fig. 1). Several 

 species of the allied genera or of the same genus are oc- 

 casionally ofi'ered in commerce, hut only one occurs with 

 sufficient frequency to demand notice. This is Enrplett- 

 rum serrulatum (fig. D and d), known in commerce fis 

 "Fine Long Buchu." The leaves resemble those of B. 

 serratifolia but are narrower and longer, 1^ to \h inch 

 long, and about i to k inch broad. The apex is shMiply 

 pointed, and does not contain an oil cell, although these 

 are present at the base of every tooth. The lateral 

 veins, which are only slightly visible in the official species 

 of buchu, are practically not visible in Etnpleuruin. The 

 odor is very different, slightly recalling that of baked 

 apples, and the faint flavor is rather like that of lemons 

 and carraways mixed, but there is a distinct bitterness. 

 Umney has pointed out that the infusion of these leaves 

 has an odor like trimethylamine, and that ferric chloride 

 does not produce in it the green coloration which it gives 

 with the leaves of B. heUiUiia. The leaves have a simi- 

 lar structure to those of buchu as regards the mucilage 

 cells. The fruit of Empleurum serrulatum is often 

 found mixed with the leaves. It consists of a single 

 carpel, linear-oblong and compressed, with a sword- 

 shaped beak, the whole being about f inch long, of which 

 the beak forms half. The fruit of Barosma consists of 

 five carpels, opening by the ventral suture, and adhering 

 by their margins when dehisced. — Phar. Journal 



For Sale. — A $45 microscope stand for $25. Address : 

 W. A. Murrill, Ithaca, N. Y. 



Books. — How to Photograph Microscopic Objects by 

 Jennings, 75 cents ; Photography applied to the Micros- 

 cope, by F. W. Mills, $1.00. Sent postpaid, by Outing Co., 

 Ltd. 241 Fifth avenue. New York City. 



