CAUSE OF COLOUR IN P. FORMOSUM IN USING THE OLDER IMNERSION OBJECTIVE

1873 The Monthly Microscopical Journal  
235 pared with a binocular instrument, but these are vcry slight indeed, and we think that considerable credit is due to Mr. Mayall, who induced Mr. Browuing to construct the instrument.
doi:10.1111/j.1365-2818.1873.tb04679.x fatcat:x7lcn5ywybah7mnj47d62ph3mm