Microscope by Hartnack; with 4 o.gs., 1 eyepiece no.2 by Zeiss, 1 diaphragm holder with 3 diaphragms, in small leather case, stage condenser, brass holder for polarizer; analyser eyepiece and polarizer in fishskin case, in mahogany case 11" x 5 7/8" x 4 1/8", used on " Challenger" Expedition