 Complete the following phrase:  In 1916 Price took up secret war work at the Royal Naval Experimental Station in Stratford, with the rank of Lieutet in the Royal Naval Volunteer Reserve. Later the number and scope of the researches expanded and he was promoted Lieutet-Commander, in charge of them all. One of the important projects was the design and filling of special apparatus for the formation of smoke screens at sea, used with great success in the 