III. A letter from Mr. Browne Langrish, Licent. Coll. Med. Lond. & F. R. S. to the Rev. Dr. Hales, F. R. S. concerning a new contrivance of applying receivers to retorts in distillation

Dear Sir, I Return you my hearty Thanks for your kind Present of your Account of some Experiments onTar-Water , I think it will be a Means of making it a more useful Medicine: I am sure it will prevent its doing the Mischief I hear it has done in some Cafes.