As the chemistry of sulphite of soda and the study of the compounds of sulphurous acid have been pursued with close application in our laboratories at Stratford, the following observations may prove inter esting. Estimation of Sulphite of Soda.-The method follow ed in our lab()ratories is�the volumetric one, based upon the reaction between iodine and sulphurous acid. StandaTd Solution of Iodine.-In preparing the ' easily effected. N ow we arrive at the uses of the inner rim and mor-Any person

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... o has made a new discovery or invent.ion can ascertain, tises in the tire. The tire has been secured to the rim free of ch arge, whether a patent can probably be ootained, by writing to at the two central mortises in each section by means MUNN & Co. of rawhide or cordage. The rim and tire, in order to We also send free OUr Hand Book about the Patent Laws, Paten:s, gain additional security, are, at the end mortises of I Caveats, Trade Marks, their costs, and how procured. Address each section of the rim, secured to the inner rim by the Monn & co., 361 Broadway, New York. same material used in securing the tire to the rim. }t Branch Office, ti22 and 624 F St., Washington, D. O.