Ka kite a Franklin i te kaupapa o te whakamātao mā te mātakitaki i te rā tino wera, ka noho mātao ake ia i roto i te koti makuku i roto i te hau maroke i te mea i roto i te maroke. Hei mārama ake i tēnei āhuatanga Franklin whakahaere whakamātautau. I roto i te 1758 i runga i te rā mahana i Cambridge, Ingarangi, Franklin me te hoa pūtaiao John Hadley whakamātautau mā te tonu wettening te pōro o te thermometer mercury ki te ether me te whakamahi i bellows ki evaporate te ether. Ki ia evaporation muri, te thermometer pānui i te pāmahana raro, i te mutunga tae 7 ° F (-14 ° C). whakaatu ana tetahi atu thermometer i te pāmahana ruma tonu i te 65 ° F (18 ° C). I roto i tona reta e Evaporation Cooling, i tuhia e Franklin e, "Kia kite te tangata i te taea o te freezing te tangata ki te mate i runga i te ra ra ra raumati mahana". Pātai: He aha i mahi pūtaiao John Hadley ki te wettening pōro
Ko te 1758