1885.] A. Pedlcr — Corrn.nnn of Lead Lininga of Indian Tea Chests. 165 



Six other small boxes of tea made of different kinds of wood were 

 also examined. These boxes were made I believe of wood after season- 

 ing in the ordinary way. They were also handed over to me by the 

 Indian Tea Association. 



No. 1. Box made of simal* wood and kept in a damp atmosphere 

 for many weeks. The lead lining was free from corrosion both on the 

 surface next to the wood and also on that next to the tea. 



No. 2. Box made of jokeef wood and kept in a damp atmosphere for 

 many weeks. The lead lining was free from corrosion both on the sur- 

 face next to the wood and also on that next to the tea. 



No. 3. Box made of kudum| wood and kept in a damp atmosphere 

 for many weeks. The lead lining was free from corrosion both on the 

 surface next to the wood and also on that next to the tea. 



No. 4. Box made of ahm § wood and kept in a damp atmosphere 

 for many weeks. The lead lining was free from corrosion both on the 

 surface next to the wood and also on that next to the tea. 



No. 5. Box made of jowah|| wood and kept in a damp atmosphere 

 for many weeks. The lead lining was free from corrosion both on the 

 surface next to the wood and also on that next to the tea. 



No. 6. Box made of seeta^ wood and kept in a damp atmosphere 

 for many weeks. The lead lining was free from corrosion except on one 

 side where there was a faint trace of a white powder on the surface 

 next to the wood, but next to the tea, the surface of the lead lining was 

 absolutely bright. There was again no perforation. 



The woods of boxes Nos. 1 to 4, and also the tea which was contained 

 in them, were exposed in contact with some tea lead in the damp atmos- 

 phere of a chemical laboratory for many weeks, and in this atmosphere 

 there would be large quantities of carbonic acid and also vapours of 

 various other acids, but no corrosion of the lead was set up, by the action 

 either of the wood or of the tea in the boxes. 



Taking then the general results of the foregoing work, it may be 

 said the experiments prove conclusively that the active agent in the cor- 

 rosion of the lead linings of these tea chests was certainly not produced 

 from the tea which was contained in the chests, but from the wood of 

 which they were formed. 



It will also have been noticed that the corrosion was never produced 



* Probably wood of Bomhax malaharicum. 



t Probably wood of Bischoffia javanica. 



X Probably wood of Anthocephalus cadaniba. 



§ Mangifera indica. 



II Probably wood of Helicia rohusta. 



% Probably wood of Anona squamosa. 



