42 BACTERIOLOGY. 



may be dried in this way, and preserved for 

 subsequent experiments. 



Other items commonly in use in a research 

 laboratory cannot be detailed here, and a descrip- 

 tion of air-pumps, refrigerators, etc., access to 

 which is nevertheless necessary for some special 

 investigations, must be sought for elsewhere.* 



* All bacteriological apparatus, as employed by Professor Koch, 

 may be obtained from Dr. Muencke, 58, Louisen Strasse, Berlin. 

 Nearly all the figures of apparatus here given are from blocks, 

 kindly lent to me by Dr. Muencke. As the cost of transport is small, 

 it is more satisfactory to obtain the special apparatus direct from 

 Berlin. Griffin & Son, 22, Garrick Street, Covent Garden, W.C., 

 will make to order any bacteriological apparatus required, and from 

 them all glass vessels and chemical apparatus can be obtained. 



