Cryophorus

cryophorus bụ akpa iko nwere mmiri mmiri na mmiri na-esi ísì ụtọ. A na-eji ya eme ihe na ọmụmụ physics iji gosipụta oyi ngwa ngwa site na evaporation. A na-ahụkarị cryophorus nwere bulb n'otu nsọtụ ejikọtara na tube nke otu ihe ahụ. Mgbe a na-achịkwa mmiri mmiri n'ime njedebe bulbed na njedebe nke ọzọ na-abanye n'ime ngwakọta oyi (dị ka nitrogen mmiri), nrụgide gas na-ada ka ọ na-ajụ oyi. Mmiri mmiri na-amalite ịpụpụ, na-emepụtakwu ikuku mmiri.  Evaporation na-eme ka mmiri ahụ dajụọ ngwa ngwa ruo ebe oyi na-atụ ya, ọ na-esikwa ike na mberede Wollaston's cryophorus was a repurposed "pulse glass".

The "pulse glass" or "pulse hammer" (German: Pulshammer) was a toy / novelty that had existed in Germany since the 1760s and perhaps earlier.  In 1767 Benjamin Franklin visited Germany, saw a pulse hammer, and in 1768, improved it.  See:
Wolla's cryophorus bụ onye bu ụzọ na ọkpọkọ okpomọkụ nke oge a.

 Akụkọ ihe mere eme 
William Hyde Wollaston kọwara cryophorus na mbụ n'akwụkwọ 1813 nke akpọrọ, "Na usoro nke ịjụ oyi n'ebe dị anya".

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