INTERNATIONAL HYGIENE EXHIBITION 



121 



lumieres and 

 pla3'ed in the 

 and executed 



Caeh of Children in tub Middle Ages. 



glass cases, greatly assisted by attached mechanical devices, helped the 

 understanding of their structure and function. 



The adult human body was, 

 in its entirety and in parts, 

 shown in the natural state, in 

 the form of models, paintings, 

 drawings, all dis- 

 most artistic form 

 by artists of the 

 first order, the high walls and high 

 windows admitting a flood of light 

 and rendering inspection thorough 

 and easy. Mechanical devices 

 were in operation for showing con- 

 traction of muscles; for explain- 

 ing the action of the nervous sys- 

 tem and the differences . between 

 mere reflex action and an action 

 involving the cooperation of the 

 higher nerve centers; for showing 

 the circulation of the blood by a 

 system of capillary glass tubes and 

 the amount of work done by the 



heart; for demonstrating the function of the special senses and the 



mechanism of respiration and of 

 voice and sound production. The 

 subject of nutrition was given 

 a prominent place. The more ele- 

 mentary chemical substances con- 

 stituting the principal natural 

 food products were shown in glass 

 l)ottles and, further, shown by 

 charts to which the percentage 

 number of each elementary sub- 

 ^^tance was attached, with the daily 

 amounts of each required by man. 

 Against a wall, there were ar- 

 langed the quantities of water, 

 salts, proteids, fats and carbo-hy- 

 drates which man consumed in a 

 year and in the form of natural 

 foodstuffs. At another table we 

 were introduced into the mysteries 

 of food adulteration and shown 

 how cinnamon was made out of brick dust, pepper out powdered lin- 

 seed oil-cake and strawberry syrup without strawberries. 



Costumes of Modern Times. 



