*42 DISEASES CLASS I. 3. 2. 7; 



In the .cafe from Liverpool, publifhed by Dr. Rollo, the pa- 

 tient did not weigh heavier after fitting ten minutes in a bath 

 of i io degrees of heat ; which fhews that no part of the diabe- 

 tic urine was owing to increafed cutaneous abforption, and that 

 this difeafe was not the aqueous but the chyliferous diabetes ; 

 and I fuppofe the patient's weighing heavier or not after ufmg 

 a warm bath may depend on the quantity of fluid previoufly 

 taken by the mowrh ; as the ikin may thence be either in an ab- 

 forbent or exhalent (late, and owing to a greater or lefs degree 

 of heat, which may render the quantity of perfpiration in the 

 bath greater than the quantity abforbed. See Seel. XXIX. 4. 5. 



7. Sttdor lymphaticus. Profufe fweats from the inverted mo- 

 tions of the cutaneous lymphatics, as in fome fainting fits, and 

 at the approach of death , and as perhaps in the fudor anglica- 

 nus. See Seel:. XXIX. 5. Thefe fweats are glutinous to the 

 touch, and without increafed heat of theftdn ; if the part is not 

 covered, the Ikin becomes cold from the evaporation of the fluid. 

 Thefe fweats without heat fometimes occur in the act of vomit- 

 ing, as in Seel:. XXV. 9. and are probably the caufe of the cold 

 fweaty hands of fome people. As mentioned in Seel. XXIX. 

 4. 9. in the cafe of R. Davis, which he cured by frequent ap- 

 plication of lime. Though it is poflible, that cold fweaty hands 

 may alfo arife from the want of due abforption of the perfpirable 

 matter effufed on them, and that the coldnefs may be owing to 

 the greater evaporation in confequence. 



The acid fweats defcribed by Dr. Dobfon, which he obferved 

 in a diabetic patient, and afcribes to the chyle effufed on the 

 {kin, mull be afcribed to the retrograde action of the cutaneous 

 lymphatics. See Sea. XXIX. 6. 



' 8. Sudor afthmaticus. The cold fweats in this difeafe only 

 cover the head, arms, and breaft, and are frequently exceeding- 

 ly profufe. Thefe fweats are owing to the inverted motions of 

 the cutaneous lymphatics of the upper part of the body, and at 

 the fome time the increafed abforption of the pulmonary abfor- 

 bents : hence thefe fweats when profufe relieve the prefent fit of 

 afthma. There is no other way to account for fweats appear- 

 ing on the upper parts of the body only, but by the fluid having 

 been abforbed by the lymphatic branch of the lungs, and effufed 

 on the fkin by the retrograde movements of the cutaneous lym- 

 phatics ; which join tliofe of the lungs before they enter into 

 the venous circulation. For if they were occafioned, as gener- 

 ally fuppofed, by the difficulty of the circulation of the blood 

 through the lungs, the whole fkin muft be equally affected, both 

 of the upper and lower parts of the body j for whatever could 

 obftruct the circulation in the upper part of the venous fyftem, 



muft 



