The collected papers of Joseph baron Lister . the large Bunsens burner(I) and the bottom of thebox, so as to prevent theheat from acting directlyupon it; while at the sametime the box is coveredover with a cover of sheet-iron (KK), which reachesnearly to the ground, and,while it checks radiation,compels the heated air totravel over the whole ex-terior of the box and escape by holes at the top of the cover, whence it isconducted into a chimney by the tube (L). By these two means combined, theshelves below and the cover round about, we get the result which you see cotton at the top of t
The collected papers of Joseph baron Lister . the large Bunsens burner(I) and the bottom of thebox, so as to prevent theheat from acting directlyupon it; while at the sametime the box is coveredover with a cover of sheet-iron (KK), which reachesnearly to the ground, and,while it checks radiation,compels the heated air totravel over the whole ex-terior of the box and escape by holes at the top of the cover, whence it isconducted into a chimney by the tube (L). By these two means combined, theshelves below and the cover round about, we get the result which you see cotton at the top of the box is browned to just the same degree as thatat the bottom. Into such a box (about one foot in its three dimensions andfurnished with a shelf in the middle) we may put a dozen sets of covered glassessuch as I have described, together with their glass plates and shades. An aperturein the top of the box, well packed with cotton-wool, transmits the thermometer (M) to show when the temperature of 300° has been attained ; and when this A a 2. Fig. 3. 356 ON THE LACTIC FERMENTATION or any higher degree short of about 350° has been continued for two hours,the gas is turned off and coohng is allowed to take place ; and when the apparatusis quite cool, the covered glasses may be removed with confidence that they areperfectly free from living organisms. In the next place, how shall any pure organic liquid be introduced into oneof these purified liqueur-glasses without risk of contamination ? This we arenow able to manage in a comparatively simple manner. The liquid is intro-duced bv means of a flask of this form (N), having a bent spout, large at the commencement and comparative^ narrow in its shorter terminal part(O) beyond the bend. The large sizeof the first part of the spout preventsit from ever acting like a syphon ;and the result is that, when liquidis poured from such a flask and thevessel is afterwards restored to theerect position, the end of the nozzleremains valved by a
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Keywords: ., bookcentury1900, bookdecade1900, booksubject, booksubjectmedicine
