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HUMAN PHYSIOLOGY 



CHAP. 



FlG. 104. An adjustable seat and desk. From 

 a sketch furnished by Dr. Mosher. (Zuppke.) 



pupil at least once 

 a term. The seat 

 and desk shown 

 here are raised and 

 lowered in the same 

 way as are revolv- 

 ing office chairs. 



Besides being ad- 

 justable, a good, 

 comfortable school 

 desk must afford 

 sufficient room for 



the legs and feet to take easy, natural positions, so as 

 not to cramp the blood vessels in any way. The back 



FlG. 105. An adjustable seat and desk as used for writing. From Dr, Mosher's 



" Hygienic Desks for School Children," Educational Review. 

 FlG. 106. Same seat and desk as used for reading. 



