103 



Since those measurements, the author has obtained another section, 

 extending from Namthabad to Daumergidda, in the Nizam's do- 

 minions, which being in latitude 18 3' 23"'6, gives a total arc of 

 9 53' 45"- 14 in amplitude. 



From the first of these sections, Colonel Lambton finds the length 

 of the degree due to latitude 9 34' 44" (the middle point of that 

 arc), equal to 60472'83 fathoms. The second section, whose middle 

 point is in latitude 13 2' 55", gives the mean degree equal to 

 60487 '5 6 fathoms; and the last section gives the degree equal to 

 60512-78 fathoms due to the latitude of 16 34' 42", the middle 

 point of that section. 



The author proceeds to compare each of these degrees, first with 

 the French measure, then with the English, and lastly, with the 

 Swedish measure, and thence obtains a general mean for the com- 

 pression at the poles. The first mean of these three degrees, used 

 with the French degree, gives the compression -TOT-TIT; tne second 

 mean of the same three degrees, used with the English degree, gives 

 ITT-T-T ; and the third mean of these three degrees, used with the 

 Swedish degree, gives ^TTT-TTT ; so that the mean of these three means 

 will give the compression -nr^-sTr. or T-TTT nearly of the polar axis. 



The number of base lines in this extensive arc are five, all mea- 

 sured with the chain extended in coffers, with elevating screws, &c. 



The author, after giving a variety of data, proceeds to investigate 

 the formulae which he has employed in his calculations, and concludes 

 with a table of the lengths of different degrees for every third degree 

 from the equator to the pole. 



The Croonian Lecture. On the Conversion of Pus into Granulations 

 or New Flesh. By Sir Everard Home, Bart. V.P.R.S. Read No- 

 vember 5, 1818. [Phil. Trans. 1819, p. 1.] 



The changes which pus undergoes in the formation of new flesh 

 are so analogous to those which take place in the blood, and which 

 were discussed in the author's Croonian lecture of last year, that he 

 is induced to consider the two fluids as possessed of the same pro- 

 perties, the colour of the globules being the principal characteristic 

 distinction between them. 



That pus is a transparent fluid, in which globules are subsequently 

 formed, was proved by the author in 1788; and in July 1817 Mr. 

 Bauer observed the same property in the serum of the blood : he saw 

 globules forming in that fluid while he was examining it in the field 

 of the microscope. Human blood, sheep's blood, and calves' blood, 

 presented to Sir Everard similar results ; the serum of which, when 

 warm and fresh, was observed, in a space covering -i-To-Wo-th part of 

 an inch, to produce from six to twelve globules in a few minutes, 

 two only being observed in the first instance. 



The author, after detailing further experiments on the formation of 

 globules in the serum of the blood, proceeds to examine the changes 

 which happen in pus upon the surface of a sore, having previously 



