Show hot root wanner A commission bent by the directors of the french railways to england and germany to report upon the means adopted in those countries for warming railway carriages during tho winter finds that france has nothing to learn from her neighbors in this respect hot water foot warmers similar to those in use on french railways being employed almost everywhere on the northern of france railway however an important experiment is about to be tried on a large scale all carriages even on short distance trains are to be warmed and the warmth is to be produced by means of boxes of acetate of soda the chemical is put in a solid state into the boxes and thesa are then plunged into hot water about begs the effect is that the soda bo comes liquid on being taken out of the water the boxes are wiped dry and are put into the carriages by degrees the soda solidifies and as long as the operation lasts that is for about five or six hours it gradually gives off the heat it has absorbed in the melting process london news |