Batman: svelte or bulky body shape?

[Tzigone]

I remember Bob Kane complaining about Batman now being drawn like an ad for Sloan's Liniment because of all the bulging muscles.

I Googled Sloan's Liniment ad just to see what he was comparing it to, but first page of results had no such images. What year did he say it - I can add it to my search terms. I'm kinda wondering if I'll see it and it'll have a guy way less ripped than comic characters of the last 30 years.