126 ATMOMETRI CO^STRFCTIO cet. 



neam wntiim , decrcnicnmm l gr. , fi per dimidiam li- 

 nc:im , ■ gr. fi pcr qir.irtam partcm lincae elciiatvic , dc- 

 crcmentiim l gr. indicatur etc. 



§.9. Ddcripfi partes proprias machinae (Iitis , adderc 

 tantiim liccat ad aptam conllnidioncm nniltam circiim- 

 fpcclioncm ct cxadiifimam fabriam reqiiiri. Inprimis 



1} Parietcs vafis CEFD , ac rotiilariim c c , dd, 

 e e , // etc. frontcs politillin-uic ct 



2) Rcgiilie aa ,dO^ ctc. parictibns vafis cxadc pa- 

 rallclac cfic dcbcnt. 



3) Vas GIKH fitum exaftiiTimc vcrticalcm habcrc 

 debet , qui obtinctur , fi machina cochlci» /t , / , ctc. in- 

 fificns auxilio cochlcanim fic collocatur , vt pondu^cula 

 7!i , n , ctc. ex filis /;; , p ;; , etc. pcndcntia cx diucrfis 

 vafis partibus procumbcntibus ^ , p r ctc. filis dirc(ftio- 

 ncni pcrmittant parictibus vafis GIKH parallclam. His 

 cautclis oblcruatis cuitatur affridus , qui machinac acflio- 

 ncm prorliis impcdire valcret. 



4) Aquac altitudo in vafe G I K H cadcm fcmpcr fcr- 

 vaii dcbct , quarc aflfundcnda cfi aqua , fi dccrcuit altitu- 

 do , vt cognofcatur dccrcmcntum tubus viircus incuruatus 

 Stv. communicarc dcbct cuni vafc 



5) Aquac in vafc GIHK tcmpcries ctiam cognita 

 eflc dcbct , quia mutata tcmpcrie ctiam dcnfitas aliquan- 

 tum mutatur , thcrmomctnim igitur aiam immcrgi dcbct 

 aquac : tubus hinc vitrcub Stv. tantae amplitudinis cffij 

 dcbct , vt thcrmomctri bulbum rccipcrc pofiit. 



6) Vt iudicari fiatim p)(lir , (juauta (it clcv.itio ma- 

 chinac ct hinc , quantum fit dccrcincntum. Scala ti' y 

 adplicaii dcbct paricti vafis AABB in lincas Lond. et 



quartas 



