54 STAINING. 



worthy house for chemical products at all events, not in the 

 case of coal-tar colours. It is not sufficient that these should 

 be analytically what they are described to be, they may be 

 pure, and yet not give good stains. I have a collection of 

 coal-tar colours obtained from one of the best London houses, 

 of the purity of which I have no doubt ; a large proportion of 

 them are useless for staining purposes. I therefore feel con- 

 strained to advise everybody to get his reagents at all events 

 his anilins from the well-known chemists Griibler or Miinder. 

 Griibler has all the tried reagents in stock, and supplies only 

 such as have been found by experiment with tissues to furnish 

 the desired stain. He also makes up fixing and staining solu- 

 tions, injection and imbedding masses, &c., according to the 

 classical formulae, and sends them out neatly packed and ready 

 for use. From experience I can most highly recommend these 

 preparations, which are, in nine cases out of ten, better than 

 those the observer is likely to make for himself. They may be 

 ordered from the price-list, or by quoting the numbers of the 

 formulas in this work. The address is Herrn Dr. G. GRUBLER, 

 Chemiker, Baiersche Strasse, 12, Leipzig. Griibler can corre- 

 spond in English. 



Miinder's address is Herrn Dr. G. MUNDER, Mikroskopisch- 

 chemisches Institut, Gottingen. 



