VI 



CONTENTS. 



MISCELLiVNEOUS INTELLIGENCE. 



I.— Mechanical Science. 



Page 



1. Dr. Mitchell's Method of 



working Caoutchouc 407 



2. Force of Draught of Car- 

 riages »&• 



3. Strength of Wine and other 

 Botties 408 



Page 



4. On the Optical Influence of 

 two coloured Objects on each 

 other 409 



5. Alloy for the Construction of 

 Pumps and Cocks 410 



II. — Chemical Science. 



Page 



1. New Method of preparing 

 Iodic Acid 410 



2. On Chloride of Iodine .... 411 



3. On fuming Nitric Acid — 

 Hyponitrous Acid, &c 412 



4. Decomposition of Water by 

 Heat and Metals ib. 



5. On Mellitic Acid — Carbon, 

 and Oxygen 413 



6. Decomposition of Carbonic 



Acid by Metals 414 



7. Decrepitating Common Salt 



— Condensation of Gas in 



it ib. 



8. lodates of Potassa. Chlo- 

 riodate of Potassa, &c. Bin- 

 iodateof Potassa 415 



Tri-iodate of Potassa ib. 



Chloriodate of Potassa .... 416 

 lodate of Soda ib. 



P.«« 

 9. Detection of Baryta or 

 Strontia when present with 

 Lime ib. 



1 0. Magnesiiun. Metal of Mag- 



nesia 417 



11. New Metal Thorium, and 

 new Earth Thorina ib. 



12. Sulphuret of Zinc 419 



13. Pure Oxide of Cobalt ib. 



14. Preparation of pure Oxide 



of Nickel 420 



15. Preparation of Sugar from 



Starch 421 



16. Estimation of the Vegeto- 



Alkali in Peruvian Bark, . ib. 



17. Taste of Sulphate of 



Quinia 422 



18. Phosphate of Quinia ib. 



19. Sertuerner's supposed new 



Alkali, Chinioidia ib. 



