Show A theodore The koopman describe a method by which lio lie proposes to make submarine many boats more safe the method lie lic gives would have been useless in tile the case in X problems of the french for iier ter shell was of modern crushed and this opened her seams scams beyond control the present submarine construction submarine aub ca marine is in ill tile the developmental otilge A 40 knot submarine will put a stop to th alu building of dreadnoughts as cu effectually ili as the monitor with its shot revolving proof by DR FREDERIC C WE sea turret which enabled a gunner to train his gun on oil an opposing 11 ship irrespective of relative positions on the water put I a slop to the building of wooden warships the sinking C of the alic Pluvio sc suggests an improvement which occurred to me ine somo some time lime ago a submarine having a horizontal keel its entire length in each side so hinged 0 that these keels will fall anway awa y when released such keels containing air bugs bagi rolled up mid and conn connected ted with liquid nir air tanks within the submarine ol oj alich capacity that the expanded air could lift the submarine as a whole lo 10 the surface would have met the conditions of the Pluvio sc accident saving the lives of the crew bit plain air bags would have been worth less for under well known physical laws which say that doubling lou bling tilt dessure on a gas will halve its volume and vice versa a plain air bug bit would have been crushed to half its volume at 33 feet in depth in salt sail water and if inflated at gf feet down would have burst on coming to the surface of the water this demands the use lase of valves calv ca with the air bags which will act automatically mati cally to equalize the he outside hydrostatic pressure and the air pressure within the nir air hags bags irrespective 0 of r tile depth of tho bags submersion |