412 Mr. Coathiipe's Experiments on the Products 



great care, with every reasonable precaution, and with 

 the honest intention of reporting the truth undisguised. 



2nd. Their apparatus was good of its kind. It belonged to 

 the laboratory of the Royal Institution. 



3rd. Their reagent was lime-water. 



"tth. Their eudiometer consisted of a tube containing 07ie cubic 

 inch, graduated into 100 equal parts. 



5th. The time required for obtaining their average supply of 

 respired air was generally from 10 to 11 minutes. 



6th. The operator's ordinary respii-ations were 19 per minute, 

 but during the period necessary for obtaining the quan- 

 tity of respired air upon which Messrs. Allen and Pepys 

 bestowed their attention, they amounted to only 5 per 

 mintite. 



7th. All their experiments were made either before breakfast, 

 or immediately before dinner. 



8th. Their average of " carbonic acid gas produced by the 

 process of respiration" amounted to 8 per cent, upon 

 the air respired *. 

 To prove whether there could be any difference in the 



quantity of carbonic acid gas produced by protracting the 



usual time of natural respiration, two bags were filled, the 



one immediately after the other, with air respired as follows : 

 No. 1. Bag, by respiring 18 times per minutel „ 

 No. 2. Bag, by respiring 4 times per minutej 



No. 1 . Bag. 124-5 parts, became 120-33 .-. loss = 3-34 p.cent. 

 116-33 do. do. 112-33.-. do. =3-43 do. 

 119-8 do. do. 11 5-66 .'.do. -3-45 do. 



3)10-22 



.-. average loss 3*41 p.cent. 



which, corrected for tension, will be 3-52 per cent. 

 No. 2. Bag. 1 10-5 parts, became 105-5 .'. loss = 4-52 



124-33 do. do. 11933.-. do. 4-02 do. 



2)8-54 



.*. average loss = 4-27 p.cent. 

 whicli, corrected for tension, will be 4-38 per cent. 



Feb. 19th. 

 Air respired at 9 p.m. Feb. 19th. 

 No. 1. Bag, filled, respiring 18 times per minute. ~| 

 No. 2. do. do. do. 3 times per minute. J 



• Messrs. Allen and Pepys's Researches in Respiration will be found in 

 Phil. Mag. First Series, vol. xxxii. p. 242. — Edit. 



