150 Intelligence and Miscellaneous Articles. 



water, and setting it aside for 24 hours, beautiful crystals of hy- 

 drate of bromal are obtained. 



Bromal. — Anhydrous bromal is composed of 



Carbon S'6^ = 4 eqs. 



Hydrogen 0*34! = 1 eq. 



Oxygen 6"33 = 2 eqs. 



Bromine 8465 = 3 eqs. 



10000 

 The hydrate of bromal is formed of 



1 eq. of bromal C* H' O'- Bra 

 4 eqs. of water H* 0+ 



1 eq. of hydrate of bromal.. C+ H'' 0« BrJ 

 When the hydrate of bromal is boiled with an alkaline solution, 

 eqs. C*H'>' O'^ Br'^ form 



2 eqs. of formic acid = C^ H- O" 

 2 eqs. of bromoforme = C* H- Br^ 



6 eqs. of water = H^ O" 



C^ H"^ O'"- Br6 

 Bromoforme decomposes into bromine and formic acid. 



Dense Bj-omic JEther (schwerbromaether). Tliis is formed in 

 great abundance in the decomposition of aether by bromine. It 

 is very volatile, possesses a very penetrating and agreeable odour, 

 and a sweet taste which remains for a length of time. It is much 

 heavier than water, and even sinks in sulphuric acid. When it 

 is boiled in this acid bromine is liberated, and a colourless fluid 

 distils. Dense bromic aether can be obtained anhydrous by di- 

 gesting it with caustic potash, and distilling it repeatedly from 

 quick-lime. It is perfectly clear, as limpid as water, and refracts 

 light very powerfully. When passed over red-hot lime it is de- 

 composed, liberating a gas which burns with a clear flame, and 

 forming bromide of calcium. When it is boiled with a solution of 

 potash, bromoforme is evolved, which is decomposed into formic 

 acid and bromine, forming formiate of potash and bromide of po- 

 tassium. The composition of this ether deduced from three ana- 

 lyses, is 1st. 



Carbon 7-80 



Hydrogen . . 1'43 



Oxygen 9-83 



Bromine 80-94 



loaoo 10000 10000 



These results indicate the following atomic constitution : 



8 eqs. of Carbon 4904 8-52 



8 eqs. of Hydrogen 8'00 1 -39 



6 eqs. of Oxygen 48-00 S-37 



6 eqs. of Bromine 470-34 81-72 



575-38 100-00 



