VOL. LV.] PHILOSOPHICAL TKANSACTIONS. IIQ 



in October 1764, whose curiosity led them to ascend the mountain, called here 

 Pico Ruivo, being the highest land on the island, the perpendicular height of 

 which above the surface of the sea is, according to Mr. de Luc's method of 

 mensuration by the barometer and thermometer, 3 14 1-Jg- English feet. Being 

 supplied by him with the proper instruments, and their watch adjusted by his 

 regulator, they carefully remarked the hour and minute each observation was 

 made, which on their return was compared with the height of the thermometer 

 and barometer in his study at the time of the observation, of which he had 

 kept an exact account during the journey. From which observations he formed 

 the following table, supposing the descent of the barometer -^ of an inch for 

 every 90 feet. 



Dr. H. suspected the justness Sr/o'mVr! ''Wonl ?£-m^[ ^,rc.ch"'^^??*"o? 



* *" tenth of in. 'rh^rr»i/nT»»»«»«r 



of the last observation, it being 



made at noon on the summit of 



tenth of in. '"-=™'".n. Thermometer. 



Degree*. 



the mountain, the sun shining j" ^ ,os2 fj J96+ 



very hot, and no proper shade 1. 3 1170 6 195 



for the instrument. The ther- ]■ ^. |350 9 150 



, . , 1. 65 1485 10 148.5 



mometers were rahrenheits. 3. 75 3375 17 198 



Though the different degrees *• f 3780 19 199 



of heat in difterent places must 



depend greatly on the accident of situation, with regard to mountains, valleys, 

 and to the different soils, &c. yet there is so much regularity in the above ob- 

 servations, that perhaps we shall not err much in computing, where the soil and 

 surface are tolerably uniform, " the decrease of heat, by Fahrenheit's thermo- 

 meter, in the proportion of one degree for near 190 feet of elevation on this 

 island." 



XIX. Of a Stme voided without H)slp from the Bladder of a fFoman at Bury. 

 Communicated by fFm. Heberden, M.D., F.R.S. p. 128. 

 The wife of Charles Coe, a poor labouring man, of Lawshall, Suffolk, aged 

 about QT, having been afflicted with symptoms of the stone between 11 and 12 

 years; her urine continually draining away with great uneasiness, and sometimes 

 excruciating pains; and for some years unable to sit on a seat; on Monday, Feb. 

 11, 1765, voided a stone of a great size. For 2 or 3 days before the stone 

 came away, blood was discharged from the meatus urinarius, particularly a large 

 quantity of blood, witliout mucus, at the time the stone was voided; at which 

 time she was not in great pain ; but after its exclusion remarkably easy. Her 

 urine then passed involuntarily without pain; and she could sit upon a seat without 

 uneasiness. Her poverty was so great, that during this long and painful scene of 



r r ■! 



