GENERAL NOTES , 9 



only the degree of intimate need in the way of food 

 supply but also the degree of help which any one 

 nation can give toward establishing better economic 

 equilibrium between countries of the world. Over- 

 populated areas are crowded because of the way of 

 living and not because ways for giving relief are 

 unknown. Distribution of knowledge is quite as 

 important as distribution of food products. We 

 have experts enough in every field of human activ- 

 ity but man does not know how to use the experts 

 which he has. A congested area is surrounded by 

 land capable of being widely opened by experts in 

 agriculture. 



The New York Times for December 20, 1920, 

 published the following note in a box column. 



BOSTON, Dec. 19. The United 

 States will have a population of 197,- 

 000,000 people, the maximum which its 

 continental territory can sustain, about 

 the year 2100, Professor Raymond Pearl 

 of the Johns Hopkins School of Hygiene 

 and Public Health estimated in a Lowell 

 Institute lecture last night. 



To support such a population, he said, 

 260 trillion calories of food a year would 

 be needed, and judging from the pro- 

 duction of the last seven years, when the 

 maximum population was reached, it 

 would be necessary to import about half 

 the calories necessary for sustenance. 



One spring the author was undecided about the 

 number of shrimps to be purchased from a dealer 

 for the purpose of stocking his stream at Merri- 



