... for chemical or biological methods ; and it mightbe carried out inmost cases on the site of the water plant. It wouldbe helpful if the Author would give a specification for the essential components of the filtrability apparatus (for example, the micro filter, and sintered glass filters used), which would...

...SIR H CHANCE; SIR C PARSONS JOURNAL OF THE INSTITUTION OF CIVIL ENGINEERS No. 2. 1946-47 DECEMBER 1946 SPECIAL MEETING. Thursday, 26 September, 1946. SIR PEIRSON PRANK, President, in the Chair. TH.E SIR CHARLES PARSONS MEMORL4L LECTURE, 1946. Optical Glass in War. By SIR HUGHCHANCE,M.A...

... destroyed along these planes. !L he glideplanes were established much earlier in metals, but I quote rock salt first, because of the ease with which this latter point can be established. The xame thing has been shown with other transparent crystals, for example, potassium halides. GLASS: ~ U R F A C...