462 THE SALIVARY GLANDS, BY E. F. W. PFLUGER. 



containing one-fiftieth per cent. After the course of an hour, 

 when the organ appears hardened and translucent by imbibi- 

 tion, fine sections may be prepared and broken up by fine needles 

 in the same solution. Solution of caustic alkali, containing 33 

 per cent., is also well adapted for the isolation of the elementary 

 parts. As soon as the gland has become brown, which occurs 

 in a quarter or half an hour, the tissue can be easily broken up. 

 The liquid in which the preparation is examined, it is obvious, 

 must not be water, but always the same solution of alkali. A 

 method especially adapted for the demonstration of the mode 

 of nerve termination is that introduced by Max Schultze, 

 which consists in laying the fresh gland in perosmic acid, and 

 thus staining the medullated nerves of a dense black colour, 

 causing them to resemble tubes injected with ink, whilst the 

 epithelial cells, examined in thin layers, are scarcely, if at all, 

 coloured. The salivary tubes only assume a brownish tint. 



