334 SCIENCE | [N. S. Vou. XLVIII. No. 1240 
Carbon- 
dioxide Me thyl- 
ether 
Ethyl- 
ether 
Meth Methy L- Fommic- 
Sp OTN hy emcee acid 
Ethyl- Acetic- 
-p 
Ht Sas palcohel pr acid +f 
+H Lit Propyl- opio- 
eae alcohol eked La Glycol- 
++++ Butane y ese iee aldehyde 
aci p 
Glyceral 
Valeri c- denvae 
©= Cyan heaace matte 
j H- Glycine 
4 Ammonia 
rf Hydroxyl- Sao) Di cyan 
amine 
On Fulminie QLp ethyl : 
acid d Glycerin Tri-stearin 
amine 
HH Dinethyi- Rao Ok 
HA Trinetnge \ 
amine Leucy1l-triglycyl-leucyl -triglycyl -leucyl-octoglycyl -glycite 
ie oR Oe 
Benzene Toluene m-Xylene p-Xylene 
ek Spare rcs 
Catechole Resorcinol Phloroglucine Qui Anthracene 
Picricacid i Tyrosine Veratro] Benzoic-acid Phtalic acid Ou 
idi a y proline Piperidine Inosi fe . g 
Pyrrolidine 
Feri ine Tri a enyl-met hane 
See 
Pyrazolidine Allant.ine Hydantoine Creatinine Nicotine 
se SUS PE Se 
Indole oe 
Xanthine Heteroxanthine Paraxanthine aha 
Harmoporphyrin Methy lxanthine Theophylline WO CL! 
ay. 23.1918 
Fig. 3. Organie Symbols. 
of the structural formula of morphine and its does not only mean CH,.COOH, but actually 
organic symbol. It will be noticed that as a 
whole the symbols differ not much from the H 
structural formula as far as their geometrical H- C_c: 0 
form is concerned, but are naturally more pre- aca 
cise. That is to say for example the symbol H O-H 
of acetic acid 
and is therefore much more exact by recording 
+ not radicals but each atom separately. 
