DEW ON THE SPIDER'S WEB. 199 



as it is part of the economy of nature that no 

 portion even of the refuse of her works is lost. 

 The most durable of those webs is that of the 

 great garden spider. 



DEW ON THE SPIDER S WEB. 



There is one little matter connected with the 

 formation of dew which is worthy of being known, 

 because it is, in so far, conducive to the preserva- 

 tion of health. Every one must know that, in 

 ordinary states of the atmosphere, wind very much 

 promotes evaporation ; and many must have felt 

 the effects of sitting near an open window, or 

 otherwise in a " draught" or current of air, and 

 that those currents are most injurious when they 

 act partially on the body. The reason is, that the 

 current evaporates moisture from, and causes to 

 shrink, that part of the body against which it 

 sets, so that the circulation in the capillary ves- 



