110 Papers from the Department of Marine Biology. 
TaBLe 3.—Properties of photogenic substances. 
Property. Luciferase. Luciferin. 
Alkaloidal reagents: 
Phosphotungstic acid............. Completely precipitated..| Very nearly completely 
precipitated. 
Phosphotungstic’and’aceticacidswaiioces « < odieels cco. swe ses Do. 
Phosphottngstie acid and ECW. ....2 |). ..aeteleeiesics cis wla we sous Completely precipitated. 
PR ATINIG KA CLG: eharshe, sroyemiers corto eke wie Nearly completely pre- | Nearly completely pre- 
cipitated. cipitated. 
Manniciandsacetichacids: «, soca siecle Same ieilete als ceaieve wroness, otcus Do. 
FRANNICIACIMSE ATMEL Os, cet ais) croton ceases All ceerctatcenvane cae, Sere nae Do. 
PICHIC* ACI Aa raysqtentor oe a sieie Sirieke aie ator Nearly completely pre- | Not precipitated. 
cipitated. 
Picnic andliacetiG ACKAS so oc e ck Sie like arstaie ois e.s Sree mleres we Do 
IRI CTIO ACI ONAN Gy EL © liste toe crc pastareel| obit oan aotttcoilensu atccla eubare se ccyena eee Do 
Keb e(CIN) ¢ ANGFAaACetrOv ard seoce coseccosssll ss, cro bsteNOrePeeT a oro, siisre caine fevers Do 
Heavy metal salts: 
Basic lead acetate..............-. Completely precipitated..| Not completely precipi- 
tated. 
Neutral lead acetate.............. Nearly completely pre- 
cipitated. Do. 
Neutral lead acetate and acetic 
SCIGs 2) OS ii La coe nas Sete rane ncrere Not precipitated. 
Mereurie*chloride: +. 5...0 4.0. a2. 0 Not precipitated......... Not completely precipi- 
tated. 
Mercuric:chloride/and acetic acid’... 4|\2ea Seine k oc es. Almost completely pre- 
cipitated. 
Uranyl nitratevand: acetic acid)’. 5.4.c|'s «.s.. eee leeiee ov ersacis.cusie.ae ore Not completely precipi- 
tated. 
Acids and alkalies: 
eee ee mee ee eee ee ee we ewe we we ee | ANOU PICULPILALCU.,...22.06- 
P1OLS OO OS @ C10 we Ce 06 e100 ee 6 6] 0 0 © 0 ome © Ce C6 6 v6 6 6 0 oe 
©)016 (o: fe) 0 ele lotieeie1e. .0 0:6 0.10: 6) je: (el je! es. \9 6:1 ke (0: 1e ja or aU 6: jele, © Lee le ©. (6,6! s ie) ie) 16:5 
