ii6 



THE POPULAR SCIENCE MONTHLY 



Central Room of the Building for Settlement and Habitation. 



hensible. To mention only the sums contributed in this way during 

 the year 1909 : 



Marks 



Sickness insurance 342,200,000 



Accident insurance 162,266,000 



Invalidity insurance 189,029,000 



Total 693,495,000 or 



Daily 1,900,000 



The comprehensiveness of the machinery of the workingmen's insur- 

 ance is beautifully illustrated in the picture of an oak and its effect on 

 the whole body of workingmen is intended to be shown by a figure 

 representing a workingman, designed by Professor Hosaeus, Berlin. 



Eace Hygiene. Director Dr. von Gruber, Munich 



Eace hygiene has for the first time found a place in hygienic exhi- 

 bitions. It had for its object the calling of the general attention of the 

 public to the immense importance of heredity upon the prosperity and 

 the degeneracy of the race, upon the inherited constitution which, 

 when strong, bids defiance to unfavorable conditions, when weak, suc- 

 cumbs in spite of the most careful nursing. The public at large must 

 learn to appreciate the necessity for exercising a reasonable amount of 

 care in the selection of a life partner. 



With the aid of 200 tables, charts and colored natural objects, the 

 laws of heredity were demonstrated and it was shown how, through the 

 continuity of germ plasm, in plants and animals, different character- 

 istics are transmitted from one generation to another. The different 

 kinds of variability, as fluctuation and mutation, are made clear. The 

 laws established by Mendel, together with the results of the latest experi- 



