1C6. 



PLATS XVI II. 

 Fig. 103. 



Kig. 107. 



Shows the manner in which the sides of built 



glass cells are cemented together in order to be 



ground perfectly flat, p 64. 



. 109. 



Sho w s the w ay in 

 which the angles of a 

 built glas s cell are 

 joined together p. 65. 



Large built ^lass cell. p. f5 



Fig. 110. 



To illustrate the manner in 

 which cells of a peculiar shape 

 may be made. The lower part 

 is made of plate-glass, to which 

 the tube is attached by gutta- 

 percha. This apparatus was 

 made for examining the circu- 

 lation in the branchiae of a 

 proteus. The smaller tubes 

 were for the purpo s e of sup- 

 plying the animal with fresh 

 water. p. 65. 



Fig. 111. 



Deep glass cell, made by bending a piece of glass in the 

 blowpipe flame, p. 65. 



Fig. 112. 



Animalcule cage, for examining deposits 

 from fluids, p. 66. 



growing cell, designed by Dr. Barker p. 



Fig. 111*. 



Simple arrangement for conduct > :ug bodies 



under observation, p. 6? 



[To face page 68. 



