f r o m policemen t o carboys . . . if it's m a d e of Polyethylene-
MACHLETT
NEWS methods are well described, and liter ature citations are given for all pro cedures and methods. It is a very useful, comprehensive reference work which will be of great value to organic chemists and analytical chemists. It can be highly recommended. Handbook of Colorimetric Chemical Analytical Methods. 2nded. 206 pp. and advertising supplement. The Tintometer Ltd., Salisbury, England, 1953. Sold by T. G. Walshe, Box 345, Oyster Bay, Ν. Υ. $5.00. Re
can fill y o u r needs
viewed
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COBNELIA
T.
SNELL,
Foster D." Snell, Inc., New York, Ν. Υ.
E12-471 LIGHTWEIGHT CARBOYS
Inside Diam. 1/8" 3/16" 1/4" 3/8" 1/2"
E74-9S7 KEMFLEX TUBING Less 50 100 than to to Over Wall 50 99 999 1000 Thickness Feet* Feet* Feet* Feet* 1/16" $.30 $.21 $.17 $.12 1/16" .40 .28 .22 .16 1/16" .48 .32 .25 .19 1/16" .52 .38 .32 .26 1/16" .65 .46 .40 .33 * Above prices are per foot.
(with polyethylene Buttress Caps) Capacity Lots of Lob of Galions Each 6, Each 12, Each $20.00 S19.00 S18.00 6'Λ 13 32.00 30.00 28.00 E12-472 JACKETED CARBOYS Capacity Lots of Lots of Lots ol Gal 1-2, 3-5, 6-12, lons Each Each Each 6'/ 2 $30.00 $27.00 $24.50 13 37.50 42.00 35.00
Techniques are described for use of the Lovibond Comparator and the Nesslerizer with glass standards. The methods cover elements such as copper, iron, and titanium; compounds and commercial products such as carotene and syndets; quality grading tests as for activated carbon, and sand for con crete; clinical applications as icterus index, hemoglobin, and blood urea; toxic gases ; and nesslerization, for such elements and compounds as ammonia, bismuth, and tar acids. Sintesi ed Applicazioni dei Reagenti Organici nell'Analisi Chimica. G.
M. Reiner, xxxii -f- 444 pages. Editore Ulrico Hoepli, Milan, Italy, 1953. Price, 3000 lire. Reviewed bv HANS A. SUTER, Rollins College,
E49-991 JARS With airtight cover and metal carrying handles. Height 1 0 " , Top Diameter SYa", Bottom Diameter 7", S3.00 Each $32.50 per Dozen.
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The purpose of the book as set forth by the author is to have in one volume a collection of procedures for the synthesis of organic compounds used in analytical E49-991/1 JARS chemistry. The methods of synthesis Same as above, but without cover and carrying handles. are carefully outlined and the physical $2.00 Each $20.00 per Dozen. and chemical properties of the organic compounds clearly stated. It is unfor E28-441 CYLINDERS, GRADUATED tunate that no yields are stated for the E36-851 FUNNELS Capac Sub divi ity Lots of Lots of Outside Diameter (in.) procedures given and no reference to the (ml.) sions Each 6, Each 12, Each Top Bot. original literature is made. It is the 500 25 ml. $11.50 $10.00 $ 9.00 of of Stem 1000 50 ml. 13.75 12.00 10.00 Top Stem Stem Lgth. Each Doz. opinion of the reviewer that the pro 3 7/16 5/16 3" $1.00 $10.00 cedures for the preparation of such read 4 11/16 5/8 1 5/8" 1.25 12.50 E7-128 WASH BOTTLES 6 13/16 5/8 3 1/4" 1.40 14.00 ily available compounds as salicylic 714 1 7/8 3 1/8" 1.50 15.00 Capacity Lots of Lots of acid, 2-naphthol, 1-naphthylamine, etc., (or.) Each 3, Each 12, Each E5-294 BEAKERS 4 $ .90 $ .80 $ .63 could be omitted. 6 1.00 .90 .70 Capacity ml. 30 70 100 200 150 8 1.10 1.00 .75 The second part of the book consists Each List .65 .70 .75 .80 .90 16 1.40 1.30 1.20 Capacity ml. 300 400 600 800 of a noncritical selection of test pro 32 2.00 1.80 1.60 Each List .95 1.00 1.45 1.65 cedure for the identification and deter E77-932 POLICEMEN mination of metal ions and anions. E6-301 DROPPING BOTTLES One end flattened with diagonally cut edge. Size 7 " long, 2 oi. c a p . . . $.50 Each... $5.00 per Dozen Some qualitative procedures for a few Ά" diam.—$.40 Each $3.60 per Dozen organic functional groups are included. E77-J31 STIRRING RODS ES-779 POUR OUT SPOUTS A nice feature of the qualitative pro Same as Policeman but without flattened and diagonally cut end. Size 614 " long, V4 " diam. For bottles with 38 mm. neck finish only cedures is the listing of interferences, $.35 Each $3.00 per Dozen. $.75 $7.50 per Dozen but the sensitivity of the tests is poorly defined. Only the concentration limit A L L PRICES F.O.B. NEW YORK, Ν . Y. is stated without mentioning the vol Four page (older for your Files available on request. ume of solution employed. The bibli ography for the analytical part of the ESTABLISHED F.MACHLETT & SON MACHLETT book is incomplete and poorly organized. 220 EAST 23rd STREET - NEW YORK 10, N. Y. 1897 It is not up to date and numerous mis Laboratory APPARATUS SUPPLIES CHEMICALS prints make it unreliable. E5-77I BOTTLES WITH POLYETHYLENE SCREW CAPS Large sizes—16 oz., and Vi, 1 and 2 gallon size—supplied with polyethylene Buttress Caps CAPACITY (oz.) 1 2 4 8 16 NECK FINISH (mm.) 20 20 24 28 38 EACH $ .25 .35 .40 .45 .65 DOZEN $1.80 1.90 3.00 3.65 5.75 CAPACITY (oz.) 32 14 gal. 1 gal. 2 gal. NECK FINISH (mm.) 38 38 38 38 EACH 1.20 3.95 5.00 9.65 DOZEN 11.00 40.00 50.00 100.00
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ANALYTICAL
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