INCREASE OF THE COLORED POPULATION-. 665 



Several more or less closely analogous cases have been recorded ; 

 but until within a recent period every one naturally felt much doubt 

 whether the effects of a mutilation or injury were ever really inherited, 

 as accidental coincidences would almost certainly occasionally occur. 

 The subject, however, now wears a totally different aspect, since Dr. 

 Brown-Sequard's famous experiments proving that Guinea-pigs of the 

 next generation were affected by operations on certain nerves. Dr. 

 Eugene Dupuy, of San Francisco, California, has likewise found, as he 

 informs me, that- with these animals "lesions of nerve-trunks are al- 

 most invariably transmitted." For instance, "the eft'ects of sections 

 of the cervical sympathetic on the eyes are reproduced in the young, 

 also epilepsy (as described by my eminent friend and master Dr. 

 Brown-Sequard) when induced by lesions of the sciatic nerve." Dr. 

 Dupuy has communicated to me a still more remarkable case of the 

 transmitted effects on the brain from an injury to a nerve ; but I do 

 not feel at liberty to give this case, as Dr. Dupuy intends to pursue 

 his researches, and will, as I hope, publish the results. Nature. 



inceease axd moyemext of the coloeed pop- 



ulatio:n^. 



By J. STAHL PATTEKSON. 



I. INCREASE. 



THE problem of races in the United States is one of growing in- 

 terest and of great practical moment ; that of the colored race, 

 especially at the present time, is full of significance in its social and 

 political aspects. It is proposed in a couple of articles to inquire 

 briefly into the phenomena of increase and movement of the colored 

 population in the light of the most recent observations and statistics 

 which bear upon the subject. The first table we shall consult is that 

 which gives the increase of the white and of the colored population for 

 each decade from 1790 to 1880 : 



1st census. 

 2d " 



3d 



4th 

 5 th 

 6th 

 7th 

 8th 

 9th 

 10th 



u 

 u 

 u 

 a 

 u 



Tear. 



White. 



1790 

 1800 

 1810 

 1820 

 1830 

 1840 

 1850 

 1860 

 1870 

 1880 



3,172,006 



4,306,446 



5,862,073 



7,862,166 



10,537,378 



14,195,805 



19,553,068 



26,922,537 



33,589,377 



43,402,408 



Colored. 



757,208 

 1,002,037 

 1,377,808 

 1,771,656 

 2,328,642 

 2,873,648 

 3,638,808 

 4,441,830 

 4,880,009 

 6,577,497 



1st decade. 



2d 



3d 



4th 



5th 



6th 



7th 



8th 



9th 



