404; Mr. Coathupe's Experiments on the Products 



the lime-water which occupied the space below the plug. The 

 tube with its contents were well agitated, the finger was re- 

 moved from the orifice of the stop-cock, the same extremity 

 was again immersed in the lime-water, and the plug of the 

 cock gently turned. 



As soon as the lime-water had risen within the tube to its 

 fixed level, the cock was closed again ; the finger replaced 

 upon the lower orifice, and agitation renewed. 



This process was repeated until the lime-water ceased to 

 absorb any of the air contained within the tube. Two opera- 

 tions, however, were generally sufficient. The tube was then 

 hanged up by a loop of wire against a corner of the wall, and 

 when the interior had drained to a permanent level, the upper 

 cock was opened ; a small quantity of air immediately rushed 

 into the tube to relieve the tension, and with it generally a 

 single drop of lime-water that had occupied the small space 

 within the bore of the upper cock beneath its plug. 



The difference between the number of divisions, or parts, 

 first observed to be unoccupied by the lime-water, and the 

 number of parts lastly observed to be unoccupied, is the num- 

 ber of parts of carbonic acid gas that was contained in the 

 number of parts first observed. 



As these experiments were commenced and concluded with 

 as little delay as possible, it was not thought necessary to re- 

 gister the height of the barometer, nor the temperature ; but 

 every precaution was taken to commence and conclude every 

 set of experiments from the same bag of air, under precisely 

 similar circumstances. The tube, the bag of air, and the 

 lime-water were invariably of the same temperature, both 

 before and after each experiment. 



The periods selected for the experiments were. 

 From 8 a.m. to 9| a.m. before breakfast. 



9^ a.m. to 12 noon 1 during the digestion of break- 

 12 noon to 1 p.m. j fast and before " luncheon." 

 I ]).m. to 5^ p.m. before dinner. 

 5| p.m. to Sf p.m. during the digestion of dinner. 

 8| p.m. to 12 night. 

 Habits of the operator. 



At 9^ a.m. a slender breakfast. 



1 p.m. to 2 p.m. do. " luncheon." 

 5 J p.m. a good dinnei-, with a pint of wine. 

 8| p.m. one small cup of tea. 

 10 p.m. occasionally one glass of weak brandy and 



water. 

 12 to 1. bed time. 

 Age, 38 years. Stature, 5 feet 8 inches. Weight about 

 140 pounds. 



