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LABORATORY 
 
 OF THE 
 
 INLAND REVENUE DEPAHTMENT 
 
 OTTAWA, CANADA. 
 
 BUT^T^ETTN^ ]Sr<>. 287 
 
 TEA 
 
 60775—1 
 
■ \: a 
 
 LABOKATOHY 
 
 OK THE 
 
 INLAND REVENUE DEPARTMENT 
 
 OTTAWA, CANADA. 
 
 BULT^ETIN^ ISTo. '2S 
 
 TEA 
 
 Ohawa, April 21', 19U. 
 
 J. U. VlNCKXT, EmJ., K.C, 
 
 Asst. Deputy Minister, Inland Revenue. 
 
 Sib, — I Imvi! the lionour to hand you a report dealing with 119 samples nf ti a 
 purchased throughout Canada by our inspectors in September, October anil Noveiiilj*-!- 
 of last year. 
 
 The ia.st considerable investigation of this article was made in April, 1909 (Bull. 
 lt<3). Previous examination of tea (see Bull. 24, June, lt<91 ; Bull. !)9, July, \'M)\ ; 
 Bull. I.'IO, Jan , 1907) had .''hown it to be so generally satisfactory in character, ai tn 
 justify its bein^' less fre(|uontly collected than other kinds of food, more prone to iniuU 
 eration. The present report coroborales exj>ectation in this regard. 
 
 Doubtless the fact that tea is subjected tj careful supervision by tlic customs 
 authorities at ports of entry ha.s much to do with its generally satisfaetorv charnctci-. 
 
 An Orderin-Council dated September, 1891, fixes certain constants for tpa. 
 
 1. Asil. — Must not exceed 8 per cent, by weight, reckoned on the dry tea. 
 All sample.s herein reported meet this reiiuirement. 
 
 2. Watf.r Soi.ubi-k Ash. — .Must not be less than 2 75 per cent. 
 
 3. K.xTHACTiVK M.\TTEK. — Must not be less than 30 per cent, of tiie weight of the 
 
 tea. 
 
 Most of the samples now reported yield much mure than 30 per cent, cxtractivi', 
 many of them nivin^ from SO to 40 per cent. 
 
 Fuui' samples give slij,'litly less than 30 per cent., but come very near the 'nininmm 
 limit. Only one sample (No. 5970C) is notably lower than 30 per cent. 
 
 Even these samples cannot be legally held to be ailulterated, since the tJrder in- 
 Council does not detine a nietlmd of wurkiiig for extractive matters ; and I have sliowu 
 in Bulletin No. 1.^3. p. 4, that different modes of extraction give such widely ditieieiit 
 results that until some well delined method is made olilii;atorv the datum remains too 
 uncertain to be strictly iiiterpreied. 
 
Facing is indicated in 13 lample*), but i« so slight a& U> be disregarded from the 
 ijdiiit of view of harmfulness. K -^ 
 
 I )n t lie whole, this report may be Uken to prove that there is no note-worthy 
 iiiliilicration of tea in Canada. 
 
 I lyg to recommend it* publication as Uulletin No. 287. 
 
 I luve the honour to he, Sir, 
 
 Yuur obedient Nervunt, 
 
 A. McOILL, 
 
 Chief Anttlytt. 
 
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