r'LATB LXIX. 





Section of moveable shatter with apparatus attached, a. shutter; 



ft. sliding brass tube to join the short body of the microscope; 



c, brass plate t close the aperture in the shutter ; d, handle to 



'.a same from within the room; e, glass cell containing the 



: per solution : /, brass tube carrying the microscope mirror; 



h h, steel rods to adjust the mirror from within the room. 



p. 3"*2. 



Fig. 41r 

 3, 



d\ 



Transverse section of car and. track, to show the 

 rails and the apparatus for clamping the car to the 

 same, aa, small brass wheels grooved; 66, flat iron 

 rails "with a A-shaped projection to fit the groove into 

 the wheels; cc-. wooden rails ; d, cross-piece connecting 

 the sides -of the car; t. vertical iron rod passing 

 through the same; /, cast-iron cross-piece to clamp 

 under the iron rails; g. screw nut, with handles, to 

 elevate the satne. p. 34^. 



F:g. 416. 



longitudinal section of posterior half of car. to show 

 the apparatus for obtaining the focus of the image. 

 tt. grooved iron shaft running the wli of the 



irack and passing under the car; J, bent brass bearing, 

 supporting two bevelled gear wheels ; c, bevelled gear 

 wheels ; d vertical iron rod attached to the \ipper 

 wheel ; e. milled head on the upper extremity of the 

 same ; /, collar to support the iron rod. 



Tie. 417. 



General arrangement of Dr. Woodward's apparatus for taking photographs of microscopic objects as 

 ; utside the window, a. Th- parts 



i ; 



[To face pa^e 3ii 



