590 SEC. 13. CHEMISTRY. 



XVI. 



Nitroalizarin C 14 H 7 (NO 2 )O 4 =C 6 H 4 { gg j C 6 H(NO 2 )(OH) 2 . 

 Amidoalizarin C 14 H 7 (NH 2 )O 4 = C 6 H 4 { QQ } C 6 H(NH 2 )(OH) 2 . 



XVII. 



Anthrapurpurin C 14 H 8 O 5 =C 6 H 3 (OH) { g j C 6 H 2 (OH) 2 . 

 Triacetylanthrapurpurin C 20 H 14 O 8 = C 6 H 3 (O Ac) j j C 6 H 2 (OAc) 2 . 



XVIII. 



Anthraflavic acid = C 14 H 8 O 4 = C 6 H 3 (OH) { } C 6 H 3 (OH). 



Baric anthraflavate 2C 14 H 6 Ba0 4 , 3H 2 O. 



Diacetoanthraflavic acid=C 18 H J2 O 6 = C c H 3 (OAc) C 6 H 3 (OAc). 



XIX. 



New isomer of alizarin yielding anthrapurpurin on fusion with potassic 

 hydrate C 14 H 8 O 4 . 



XX. 



Crystallized glyoxylic acid obtained from dibromacetic acid C 2 H 4 4 = 

 0(OH) 



Calcic glyoxylate C 4 H 6 Ca"O 4 . 



243 la. 1. Calorimeter, by M. Berthelot, for thermo-chemical 

 investigations, with electric mover of the agitator. 



2. Air Thermometer, by M. Berthelot, glass, showing the 

 temperature up to 550 degrees. 



3. Air Thermometer, by M. Berthelot, silver, showing the 

 temperature up to 900 degrees. 



4. Apparatus for proving the disengagement of heat in the 

 reaction of two gases. 



5. Apparatus, by M. Berthelot, for the endothermic decomposi- 

 tion of formic acid by heat. 



6. Two sealed globes, for the synthesis of formic acid by direct 

 union of the oxide of carbon with potash, and sample of formate 

 of lead, obtained by synthesis. 



7. Apparatus, by M. Berthelot, for the synthesis of acetylene. 



8. Bell glass, curved, in which was effected the synthesis of 

 benzine, by the condensing of acetylene, by M. Berthelot ; also 

 another bell glass, empty. 



9. Alcohol, obtained synthetically, by the union of olefiant gas 

 with water. 



10. Sealed tubes, containing organic matter, hydrogenized by 

 iodhydric acid. Laboratory of the College of France, 



