Referee's report by Charles Brooke, on a paper 'On the relation of the angular aperture of the object-glasses of compound microscopes to their penetrating power and to oblique light' by J W Griffith Not recommended for publication in the 'Philosophical Transactions of the Royal Society'. Provides point-by-point observations of contention with the paper. Reviewer has written a short paper of their own, containing views on the reviewed paper's conclusions, with aim to have this published in the 'Proceedings'. Subject: Physics and Chemistry, Applied Sciences [Published in the 'Proceedings of the Royal Society of London'] 30 May 1854