VOL. XXXVI.] PHILOSOPHICAL TRANSACTIONS. 303 



measured, as 14 IQ to 2088, and yet the lower left pulmonary vein is here 

 omitted, as being tied too close to admit of being measured. But if we sup- 

 pose the inferior left pulmonary vein to be to the superior left pulmonary vein, 

 in the same proportion as in the first heart, we shall then find its diameter nearly 

 31, and its area at least 7OO ; which will make the pulmonary artery in this 

 heart, to the sum of all the pulmonary veins, as 14 IQ to '2788; and in that 

 case, the left pulmonary veins will be to the right pulmonary veins, only as 

 1309 to 1479. 



The third heart is of an abortive nearly of 5 months: by its appearance, it 

 was suffocated by too much blood. In this subject the 



diam. per. areas are 



Of the vena cava descendens 14 .... 42 . . . 197 ? ^ 



vena cava ascendens 24 .... 72 ... - 432 ^ 



aorta above the coronaries 16 .... 48 .... I92 



pulmonary artery 20 . . . . 60 . . . . 300 



canalis arteriosus 1 2 .... 36 .... 1 08 



right pulmonary branch 11 .... 33 ... . 99 ) 



left pulmonary branch 11 .... 33 ... . 99 j 



superior left pulmonary vein 11 .... 33 . . . 99 



inferior left pulmonary vein Q 27 ... . 541^ 



superior right pulmonary vein 7 • • • • 21 . . . . 42 | 



middle right pulmonary vein 11 .... 33 ... . 99- 



The inferior right pulmonary vein is here cut too close, and otherwise injured, 

 so that its area cannot be measured. Yet we find the remaining pulmonary 

 veins to the pulmonary branches of the pulmonary artery, as 294 to 198. 



We may here observe a remarkable difference between the capacities of the 

 two venae cavse taken together, aud the pulmonary artery; the two cavae being 

 more than double the pulmonary artery, and the pulmonary artery still one- 

 third larger than the aorta. As this difference could not arise in this case from 

 the blood's being condensed by the inspired air, so it seems a proof, that had 

 the fact been true, as stated by Helvetius, it had still been an insufiicient de- 

 monstration of his system. 



A Lunar Eclipse observed at Rome, Feb. 2, I728-9. By Fa. Carbone. 

 N°4io, p. 170. 



At 7*^ 44"" 22' True time, the beginning of the eclipse ; 8^ 43^" 17' the total 

 immersion; lo'' 21'" 38' the beginning of the emersion; 1 1*" 30™ 4V the end 

 of the eclipse. 



3A 2 



