
20140611-DSLR_IMG_0397.jpg by pwnell, on Flickr
Si-2, 20x/0.45*1.25, DIC

NH3 Test Solution by pwnell, on Flickr
NH3,20x/0.45*1.25, DF

NH3 Test Solution by pwnell, on Flickr
NH3,40x/0.6*1.25, POL

20140611-DSLR_IMG_0446.jpg by pwnell, on Flickr
NO2,40x/0.6*1.25, POL