June 1954 was before December 1, 1955, when the Queens Boulevard Line started feeding the 60th Street Tunnel; at the time, only the Astoria Line fed the tunnel. "Ebwaytony1"'s question refers to the 1960s, pre-Chrystie Street. I don't have the answer to his question, but it should be pointed out that the current (December 2001) AM Astoria Line service (8-9 AM) consists of 6 N trains and 7 W trains leaving Ditmars Boulevard, for a total of 13 trains. Since I'm pretty sure of what the next question (whether by Mr. Bauman or anyone else) is going to be, let's examine what's going through the 60th Street Tunnel between, say, 8 and 9 AM, toward Manhattan:
N leaving Queensboro Plaza: 8:00, 8:10, 8:20, 8:29-1/2, 8:37-1/2, 8:45-1/2, hold to 8:57-1/2 = 7 trains
W leaving Queensboro Plaza: 8:05, 8:15, 8:25, 8:33, 8:44, hold to 8:50, 8:55-1/2 = 7 trains
R leaving Queens Plaza: 8:03, 8:09, 8:15, 8:21, 8:27, 8:33, 8:39, 8:45, 8:52 = 9 trains
Total = 23 trains (and no, that's not full utilization)
David