0- 





"M^ 





'' It be. 



He 



■led 



' taller, 



this 



sne 



^yll 



n:ig CO. 



s 



be fun' 



eachincT 

 in ion of 



itrer by 



abfence 



f by the 

 they are 



' etiolat- 



ox}5en, 



le s'ree^^ 



D 



jr 



bein^ 







ms 



them 



?s; 



J 



ju 



; their 



efcapes 

 hydro- 



.h t^^^ 



tbaa 



Sect. XIII. I. 



0" 



ELECTRICITY. 



299 



O 



etables ; and the greateft part of their perfpired matter, wh 



halesVrom the lungs, is not expofed to the fun's light. In proof 



D 



of this it muft be obferved, that both vegetable and animal fubftances 

 beconae bleached white by the fun-beams and water, when they are 

 dead,ascabbage-flalks,bones,ivory,tallow,bees.wax,linen and cotton 



cloth ; and hence, I fuppofe, the copper coloured natives of funny 

 countries might become etiolated, or blanched, by being kept from 

 their infancy in the dark, or removed for a few generations to more 



th 



much 



It is probable, that on a funny morning 

 feparated from the dew by means of the points 



P 



b 



f veo"etabl 



o 



oil 



which it adh 



d much inflamm 



ci 



mbibed by th 



o 



ble, or combined with 



dj^by the fu 



decompofi 



o 



water, the effeds of it in bleaching linen feem to depend; the 

 water is decompofed by the light at the ends or points of the cotton 

 or thread ; and the vital air unites with the phlogiftic or colouring 

 matters of the cloth ; and produces a new acid, which is either itfelf 



rlefs, or wafli 



the fame time the hydrogen or infl 



mable part of the water efcapes 



Hence there feems a reafon, why 



bleaches fo much fooner than linen ; viz. becaufe its fib 



th 



four times (h 



d therefore protrude fo many more 



; vital air from 



points ; which feem to facilitate the liberation of the vital air 

 the inflammable part of the v/ater. 



A fun-flower three feet and a half high, according to the experi- 

 ment of Dr. Hales, perfpired two pints in one day, (vegetable flatics) 

 which is many times as much in proportion to its furface, as is per- 



ws, that 



ne, mufl 

 ion : and 



fpired from the furface and lungs of animal bodies j it folk 

 the vital air, liberated from the furface of plants by the funfh 



much exceed the quantity of it abforbed by th 



fp 



that hence they improve the air, in which they live, during the light 

 part of the day ; and thus blanched vegetables will fooner become 



Qq 



/ 



tanned 



I 





^ ^ 



