I've collected a few ref's on this subject and thought I'd throw them up here, I'll also add the link to the known article on the same (notice they don't give any credit to the previous researchers? CUNTS)...

Also, I strongly suspect that if a strong solution of ammonia were to be gassed with EtCl then the monoethylamine should be formed rather rapidly - course, a solution in acetone should work even better (the amine salt not being appreciably soluble therein, it shouldn't be acted on too much by further Ethyl Halide should it?).