THE UNITY OF TEE HUMAN SPECIES. 61 



of aluminium to the pint, or about 15 grains to the ounce, and is sold in 

 a fluid and solid state. Slightly diluted, the former will disinfect se- 

 cretions in the utensils of a sick-room ; and, exposed in a saucer in 

 its concentrated form, I have found it to remove even the smell which 

 is given off by a newly-painted room. In its powdered state it may be 

 sprinkled in cellars, larders, dust-bins, ash-pits, stables, piggeries, poul- 

 try-houses, and wherever a smell is continually arising. In the deo- 

 dorization of sewage, while being pumped over the garden, one gallon 

 of the fluid, or three pounds of the powder, will suffice for 150 gallons 

 of sewage. 



As regards the disinfection of clothing in the laundry, Mrs. Mere- 

 dith, the patroness of the Discharged Female Prisoners' Aid Society, 

 lately wrote to the Standard newspaper as under : 



"The articles taken in for the wash are fairly sprinkled with chl or alum-pow- 

 der; they are then packed in sacks, in which they remain for about two hours, 

 wlien they arrive at the wash-house. They are then unpacked and shaken 

 singly. After this they are put in a large tank, where a great quantity of water 

 flows over and through them. In this way they rest for at least twelve hours. 

 They are then wrung out, and undergo the ordinary process of washing. It is 

 highly satisfactory to add that not the least deterioration of texture or color 

 results." 



At the wash-houses referred to by this lady, a great number of 

 women are employed, and nothing but the washing of the sick is car- 

 ried on. 



-*- 



THE NATUKAL HISTOKT OF MAK 



A COURSE OF LECTURES AT THE IMPERIAL ASYLUM OF 



VINCENNES. 



By A. DE QUATEEFAGES, 



MEMBER OF THE INSTITUTE OP FRANCE, PROFESSOR AT THE MUSEUM, ETC. 

 TBAN6LATED BY ELIZA A. YOTTMANS. 



7". The Unity of the Human Species. 



f~^\ ENTLEMEN" : Each of my fellow-laborers in science comes here 

 VJ to lecture to you; they each select the subject which habitually 

 occupies them. Some tell you of the heavens, the earth, the waters; 

 from others you get the history of vegetables and animals. As I am 

 Professor of the Natural History of Man at the Museum, I ask myself 

 why I should not speak to you of man. 



There is evidently as much interest for us in our own species as in 

 the history of animals, even of those most useful to us. Indeed, at this 

 time, the mind is drawn toward this study by an irresistible move- 



