19$ DE BJROMETRO, CJIVS SCALA 



curii in vafe E E E flagnantis , parallclepipcdo in fitii ho- 

 rizontali rctento. Dcpriinctiir par.illelepipcdum F \\ 

 mcrcurio , vt in fitu horizontnli quiclcit pondcra 

 quaedam a ftiio vafis W fubtrahi et rummii eorum nota- 

 ri dcbct i pondus rcfiduum aequale erit liimmac n. i8. 

 impofitorum , et cadcm rurllis , quae ibi notata , altitudo 

 barometnca indicabitur. 



§. i5. Taii ratione pro qualibct prcfTione mutata 

 pondus mcrcurii vel afflucntis in vas DE vel invasAB 

 recedcntis , confcquentcr vohimcn eius et hinc altitudo ba- 

 rometrica inucniri pofTunt. Sit cnim pondus additum vcl 

 (iibducflum P , fit pondus vnius digiti cubici mcrcurii p , 

 crit p . I— P:5 ad P: 5p, coiifcqucntcr P : 5 p erit 

 volumen mcrcurii , pofitis porro cactcris vt fupra §. 9. ct 



fi — X y erit pcr acquationcm primam c -h ^["p^fb ~ "" 

 ff V : ( V -f- P : 5 /) ) — .V , fi liacc quantitas fubtrahitur 

 a ^ ct fimul tres digiti , oritur altitudo baromctrica port 

 prciVioncm acris diminutam. Et pcr acqiiationcm fccun- 



dam eiusdem ^. 9. erit 7777*7^ ^~ "TpVT ~ — ^ — -v , qnac 



fi additur ad c ct trcs digiti a liimnia fubtrahantur , ori- 



tur altitudo baromctrica pofl prcHioncm atmo('ph.ici-.ic 

 audam. 



§.17. Notandum eft circa conrtiii(flioiicm §. is-da- 

 tam ( I ) Vafis W capacitatcm non aliter nifi ipla cxpc- 

 ricntia commodc dcfiniri. 



2) Affridum oriri cx prcfTionc contra axcm , qiii (i 

 vas W (iirfnm vrgctur fcmpcr pcndct a potcntia quadam , 

 quac cft ad potcniiam quac vas furiura vrgct vt 4:5. 



Dc- 



