192 [Assembly 



Ten thousand experiments on 700 species of plants have pro- 

 duced but 250 true hybrids. Isolation continues for a while 

 some of these hybrids both in plants and animals. What exter- 

 nal circumstances can, in the least, account for the origin of the 

 race of Dorking fowls or Manx cats, &c., &c.,yet how soon would 

 they disappear if they were left to themselves. Is not this equally 

 true of the human races 1 



THE LEAVES OF COFFEE BETTER THAN THE BERRIES. 



[0 Auxiliador Da Industria Nacional Periodico Da Sociedade Auxiliadora, &c. Or, The 

 Auxiliary of National Industry, a periodical hy the Auxiliary Society, Rio de Janeiro. 

 Presented to the American Institute by the Consul of Brazil, Senor L. F. H. d'Aguiar.] 



DESCOBERTA IMPORTANTE IMPORTANT DISCOVERY. 



Coffee leaf Infusion instead of the Berry. — Chemists have found 

 the essential principles of tea and coffee to be much the same al- 

 though they still call that from tea Theine, and that from coffee 

 Caffeine. We wish to enlighten all our readers on this important 

 subject, so very interesting to the commerce of Brazil, which now 

 exports such enormous masses of the coffee berries. Dr. Gardner 

 is of opinion that the quinine is well substituted by the caffeine 

 in the same diseases, it is tonic and antifebrile. What an incal- 

 culable value is added to our already vast coffee crop by making 

 the leaves of the tree serve the caffeine much the same as the 

 theine. 



GIBBS'S ROTARY DIGGING MACHINE. 



Professor Mapes illustrated this new agricultural implement by 

 a working model. The inventor has improved the original, and 

 is now about to add one of the Mapes subsoil ploughs to loosen 

 the ground forward of the teeth, and keep them steady without 

 so much weight. Professor Mapes thinks this machine, judging 

 from experiments with the first rough machine, will do more tlian 

 three times as much work as a plough, and more than three times 

 as well, wdth the same team. 



The plough requires just as much propelling power to over- 

 come the friction of the land side as it does to turn over the fur- 

 row slice, and all that friction is worse than thrown away— it 

 compacts the land and injures it. 



