TEST 



539 



TETRAGON 



hoi. Shake 10 c.c. of oil for half a minute with o.i 

 c.c. of the furfurol solution and io c.c. hydrochloric 

 acid, specific gravity 1. 19. A red coloration will 

 result. Villier and Fayolle's Reagent for Hydro- 

 chloric Acid and Chlorin. In acid anilin solution, 

 consisting of 400 c.c. saturated aqueous anilin solution 

 and 100 c.c. glacial acetic acid, even traces of chlorin 

 cause brownish to black precipitates ; with a solution of 

 100 c.c. saturated aqueous anilin solution, 200 c.c. 

 saturated aqueous orthotoluidine solution, and 30 c.c. 

 of glacial acetic acid a blue coloration results. 

 Bromin and iodin cause no color reactions wi'h these 

 solutions, although bromin yields white precipitates. 

 For the application of this test to the halogen hydracids 

 the halogens are liberated from their combinations by 

 heating with dilute sulfuric acid and potassium per- 

 manganate. T., Vitali's, for Formic Aldehyd. See 

 T., Phenylhydrazin. T., Water-pressure, for New 

 Plumbing. The end of the house-drain is plugged 

 up with a proper air-tight plug. The pipes are then 

 filled with water to a certain level, which is carefully 

 noted. The water is allowed to stand in the pipes for 

 half an hour, at the expiration of which time, if the 

 joints show no sign of leakage and are not sweating, 

 and if the level of the water in the pipes has not fallen, 

 the pipes are air-tight. [Price.] T., 'Weber's. See 

 IVeber (Illus. Diet.). 2. For sensation: Determina- 

 tion of the smallest distance at which the two points 

 of a pair of compasses, applied simultaneously and 

 lightly to the skin, can be recognized as two separate 

 objects. T., Weiland's, for the determination of 

 binocular fixation : A vertical bar is interposed be- 

 tween the eyes and the letters to be read. T., Wen- 

 der's, for Glucose. Make a solution of I part 

 methylene-blue in 3000 parts of distilled water. On 

 rendering this solution alkaline with potassium hydrate 

 and heating with a glucose, solution it becomes decol- 

 orized. T., Wetzel's, for CO in Blood. Add to 

 the blood 4 volumes of water, and treat with 3 volumes 

 of a I % tannic solution. In the presence of carbon 

 monoxid the blood becomes carmin red ; normal blood 

 gradually becomes gray. Williamson's Blood-test 

 for Diabetes. Place in a narrow test-tube 40 c.c. 

 of water and 20 c.c. of blood; add I c.c. of an 

 aqueous solution of methylene-blue (1 :6ooo) and 40 

 c.c. of liquor potassae. Place the tube in a water- 

 pot, which is kept boiling. From the blood of a dia- 

 betic patient the blue color disappears in 4 minutes and 

 the blood becomes yellow. In blood that is not diabetic 

 the blue color remains. T., Winkler's, for Free HC1 

 in Gastric Juice. Mix a few drops of the filtered 

 gastric juice in a porcelain capsule with a few drops 

 of a 5 r ' c . alcoholic solution of a-naphthol to which 

 0.5% to I^ of glucose has been added On heating 

 gently, a bluish-violet zone appears, which darkens 

 rapidly. T., Wurster's, for Hydrogen Peroxid. 

 Paper saturated with a solution of tetramethylpara- 

 phenylendiamin turns blue-violet with hydrogen 

 peroxid. Xylose. See Orcin. T., v. Zaleski's. 

 for CO in Blood. Add to 2 c.c. of the blood to be 

 tested an equal volume of water and 3 drops of a one- 

 third saturated copper sulfate solution. In the pres- 

 ence of carbon monoxid a brick-red precipitate is 

 obtained, while normal blood gives a greenish-brown 

 precipitate. Zellner's (H.) Test-paper, by which 

 ammonia can be detected even in a dilution of 

 I : 1,000,000. The method of preparing the new 

 test-paper consists in applying the coloring-matter 

 employed as indicator, say fluorescein in solution, upon 

 a suitably colored under-ground, for which latter a 

 neutral black coloring matter is used. The fluorescein 

 shows the minutest traces of alkali by a greenish color. 



Zinc. See Rinnmann. T., Zwenger's, for Chol- 

 esterin. See 71, Liebermann' s (Illus. Diet.). 



Testaden (tes'-tad-en). A preparation from the testes 

 of the bull. Used in affections of the spinal cord 

 and in nervous troubles. Dose, 6-8 gm. dailv. 



Testicle. (See Illus. Diet.) T., Cooper's Irritable, 

 neuralgia of the testis. 



Testidin (tes'-tid-in). An alcoholic extract prepared 

 from the testes of the bull. 



Testine \tes'-ten\. A sterilized extract of the testes of 

 the ram ; used in nervous debility, impairment, etc. 



Test-meal. (See Illus. Diet. 1 T. of Germain 

 See, from 60 to 80 gm. of chopped beef, free from 

 fat and fibrous tissue, from loo to 150 gm. of white 

 bread, and a glass of water. The contents of the 

 stomach are removed after an interval of two hours. 

 T., Jaworski's, die patient ingests 1 or 2 hard-boiled 

 eggs with 100 c.c. of distilled water at room-tempera- 

 ture. After 45 minutes of quiet he drinks 100 c.c. of 

 distilled water, and 5 minutes later the contents of the 

 stomach are aspirated. T. of Riegel, a plate of 

 soup, from 150 to 200 gm. of beefsteak, 50 gm. of 

 potato-puree and a small roll ; or 300 c.c. of clear 

 broth, 150 gm. of beefsteak (fillet), 50 gm. of mashed 

 potatoes, and 35 gm. of white bread. 



Tetanolysin (tet-an-ol'-is-in) [reraioc, tetanus; '/itir, 

 to loose]. The hemolytic toxin of tetanus. 



Tetanospasmin (fet-an-o-spaz' '-min). A toxin produced 

 by the tetanus bacillus to which tetanic convulsions are 

 due. Cf. Spasmotoxin. 



Tetanus. (See Illus. Diet.) See Sign, £rb's. T.- 

 antitoxin. See under Antitoxin. T., Artificial, 

 that produced by a drug. T., Idiopathic, tetanus in 

 which there is no history of injury. T. neonatorum. 

 See Trismus neonatorum (Illus. Diet.). T., Remit- 

 tent. See Tetanilla (Illus. Diet.). T.,Wundt's, a 

 prolonged tetanic contraction induced in a frog's mus- 

 cle by injury or the passage of a strong cunent. 



Tetartocone (tet-ar'-to-kon) [riraproc, fourth; kuvoc., 

 cone]. Posterointernal cone; the fourth cusp of the 

 fourth upper premolar. 



Tetartoconid (tet-ar-to-kon'-id) [riraproi, fourth ; 

 /itjrof, cone]. Posterointernal cone of the lower pre- 

 molars. 



Tetartophyia (tet-art-of-i'-eah) \rfoapros, fourth; 

 (pieiv, to produce]. Sauvages' name for a quartan 

 fever with short remissions. 



Tetmil (tet'-mil). Ten millimeters. 



Tetraallyammonium-alum (tet-rah-al-e-am-o-ni-um- 

 al'-um\. N(C,Hj) 4 . A1 5 .S0 4 ), 4- 12 A,C A uric- 

 acid solvent. 



Tetrabromophenolphthalein (tet- rah - brom-o - ft -nol- 

 t/ial'-e-in). C M H 10 Br 4 O 4 . Colorless needles obtained 

 from an alcoholic solution of phenolphthalein by action 

 of bromin in acetic acid; soluble in ether, melt at 



220°-230° C. 



Tetracetate (tet-ras / et-dt). A combination of a base 

 with four molecules of acetic acid. 



Tetrachloroethane (tet-rah-klor-o-eth'-&n}. Carbon 

 bichlorid. 



Tetrachloromethane (tet-rah-klor-o-mttk'-dn). Carbon 

 terrachlorid. 



Tetrachloroquinon (tet-iahklor-o-kunn' -on). See 

 Chloranil (Illus. Diet.). 



Tetraethylammonium. (See Illus. Diet.) T. Hy- 

 droxid. a solution of N(C,H s ) 4 OH, a colorless alka- 

 line bitter liquid. It is a uric acid solvent. Dose, 

 0.6-1.2 c.c. 3 times daily well diluted. 



Tetragon, Tetragonum (tet' -rag-on, tet-rah-go' -num). 

 A four-sided figure. T. lumbale, an irregular, rhom- 

 boid space in the lumbar region beneath the aponeu- 

 rosis of the latissimus dorsi, bounded externally by the 



