21) Built a laboratory which included a wind tunnel, work done there would influence some of the first aviators (7,6)
33) Enlisted as a volunteer in the Franco-Prussian war, then spent 10 tedious years as a clerk in the navy department (3,2,10)
40) Claimed he did not invent cinema but made it into an industry (7,6,5)
46) Family members of the rat pack(4,5,3,6)