Il8 THE TEACHING BOTANIST 



sible to refine illustration to a needless and enervating 

 extent. These objections, however, do not apply to 

 enlarged models of minute and difficult subjects, such 

 as embryological development, nor to models of entirely 

 unfamiliar objects ; and especially it does not apply to 

 such models as the Blaschka series in the Botanical 

 Museum of Harvard University, which inspire in the 

 beholder no sensation except wonder and admiration. 



The principal makers of botanical models are Auzoux, 

 of Paris, and Brendel, of Berlin, and in this country 

 Kny and Company, of New York, make a specialty of 

 their importation. There are purchasable, also, useful 

 models of spiral vessels, of stomata made of rubber 

 so they may be inflated, of fibro-vascular bundles in 

 growth, etc., the usefulness of all of which varies with 

 the individuality of the teacher. 



