clilorido; absorption mnchinca dopcnd on the uso of nmmonin with m t o r . but a n objection to the lattor process is tho didculty of denling with tho witcr whicli necessarily ovnporntes with nnimoiiin. Carbon dioxido is not e~nployed in nnvnl work Imnuso tho ofieioncy of tho ~I n n t ciepends on :I constant low tempernturo of tlio condenser water, : i d this cficicncy is reduced in hot sons. Ammonin conipression plants nro nlso rcjccted by nnvnl :iuthorities sinco t h y usunlly lcnk ; but ethyl c:lilorido iH employed, nlthougli tlicro is d:ingcr of its nipour ninking nil explosive misturc with air. Sul liur cliosido has lnrgely gono out of iiso. TI0 prcsent proposds drpcnd upon tho fnct tlint solid ammonium nitrnta nbsorbs nminonin to form 0110 or moro liquid compounds which ovolvo tlioir :ininionin nlicn licated to 1000 C. To irevent tho formntion of ccllul:ir layers wviiic~i woud rctnrd tlio evolution of amrnoiiin from tho liquid, iimmoiiiuni iiitrnto k niiscd witli kicscl ulir in tlio rntio 3: 2 by wciglrt, nnd this cnnbks tlio plant to lie kept stntioniiry. A 2-ton plant lins been erected by tho Seny Syudicnto ivliic!! producctl 26 to 30 tons of ice per ton of cod. 1110 contniner is made of ;iluminiuni slicetirig, ns iron is corrotlcd by ammonium nitmtc. With regard to tlio risk of firo wlmi othyl clilorido is cmployed, i t lint7 bcen found .b ~o i i i i i i i g tlint w~ien nietlryl c ~o r i d o is inixed wit9 ethyl chloride in suitnblo proportion, tlio resulting liquid is not only non-itiflninmeblo hut is itself n fire-convert tlieni n~ far ns iiossiblo i n t i fractions boilextinguisher. Consecluentl cylinders of tho liquid ! ing Iictwccii .lOo C. niid 200° C., tho product t o ho mixturo stored oii bonrd d i p may servo n doublo ! cqiinl in qu:ility to norninl iinplitlin products niicl purpose. I tlio yiclcl : i d opcrntiiig espciiso to bo co~iimcrcinlly ' practicable.