POUCH 



1171 



POWER 



See Bronchitis. P. Clay. See Argil/a. P. Con- 

 sumption, a form of pneumonokoniosis prevalent 

 among potters. P. Lung, a chronic inflammation of 

 the lungs common among potters, and due to the 

 inhalation of dust. 



Pouch [powch) [Fr., poche, a pouch, pocket]. In biol- 

 ogv, a sac, cecum, diverticulum or bag-like structure. 

 P. -bone, a marsupial bone. P. -corona, the coronal 

 intestine of Medusa. Same as Canal, Corona. P. of 

 Douglas, the cul-de-sac of Douglas, a pouch formed 

 by the recto-uterine fold of the peritoneum. P. of 

 Fabricius. See Bursa fabricii. P. -gestation, gesta- 

 tion in a pouch, as in marsupials. P. -gill, one of the 

 gills of the lamprey, or marsipobranchs. P., Gut- 

 tural, in biology, one of the large mucous bags in 

 solipeds situated between the atlas and the anterior 

 portion of the pharynx and larynx. P., Hair, the de- 

 pression in the skin in which the hair grows. Ps., 

 Ileo-cecal. narrow-necked folds of the peritoneum, at 

 the termination of the ileum. P., Inguinal, a fold of 

 the peritoneum behind the internal abdominal ring. 

 P., Laryngeal, a blind pouch of mucosa opening into 

 the ventral part of the ventricle of the larynx. P., 

 Marsupial ; in marsupials, the bag on the anterior 

 abdominal wall in which the young are carried. P., 

 Needham's, in biology, an enlargement or cecal di- 

 verticulum of the seminal duct of a cephalopod. P., 

 Pararectal, the lateral portion of Douglas's pouch. 

 P., Paravesical, the paravesical fossa. P. of Rathke, 

 the diverticulum from the pharynx in the embryo, 

 which goes to form the anterior portion of the hypoph- 

 P., Rectal, of sharks and rays, a vascular and 

 glandular dorsal diverticulum of the rectum, which 

 Wilder thinks may represent the allantois of higher 

 vertebrates. P., Recto-uterine, a pouch-like fold of 

 the peritoneum that is reflected over the uterus. P., 

 Recto-vaginal. Same as P., Recto-uterine. P., 

 Rectovesical, the pouch of the peritoneum that is 

 reflected on the bladder. P., of Seesel, a pouch in 

 the embryo behind the summit of the hypophysis. P., 

 Subcecal, a fold of the peritoneum behind and below 

 the cecum. P. of the Tympanic Membrane, folds 

 of mucosa around the horizontal portion of the chorda 

 tympani nerve as it passes through the tympanic cavity. 

 P., Utero-vesical, P., Vesico-uterine, a pouch of 

 peritoneum situated between the uterus and the bladder. 



Poudret, Poudrette {poo-dret') [Fr.]. A form of 

 commercial fertilizer formerly made, the basis of 

 which was night-soil, dried and mixed with charcoal, 

 gypsum, and other ingredients. 



Poultice [pol'-tis) \_-o/-or. porridge]. A mixture of 

 certain substances, as slippery elm, meal, flaxseed, 

 mustard, etc., into a soft, mush-like mass, for applica- 

 tion to the skin of a part. The poultice-material 

 should be mixed with hot water into a mass of even 

 consistence, and should be neatly spread upon muslin, 

 linen, or lint, or even upon paper. Flaxseed or elm 

 poultices should not be more than % inch in thick- 

 ness, and should receive a thin coating of olive-oil 

 before being applied. This prevents their sticking to 

 the surface of the body. P., Anodyne, one yielding 

 an anodyne effect ; it usually contains some prepara- 

 tion of opium. P., Antiseptic, one containing some 

 germ-destroying substance. P., Fermenting, a 

 poultice made by mixing wheat or corn flour with half 

 its weight of yeast, and gently warming it until it be- 

 gins to swell. It is used as an application to sloughing 

 sores. P., Galvanic. See Galvanic. P., Porter, 

 i flaxseed poultice made with a quantity of porter ; its 

 uses are those of the fermenting poultice, i/. v. P., 

 Vaginal, a poultice introduced into the vagina in the 



| treatment of gonorrhea in the female. 



Pound (po:vnd) [AS., pund, pound]. In Troy weight 

 12 oz. or 5760 grains ; in avoirdupois. 16 oz. or 700c 

 Troy grains, or 453.6 grams. Symbol lb. See Weights 

 and Measures. P., Foot, the force necessary to raise 

 one pound through the height of one foot. P. -nose, 

 a nose that weighs a pound, a vulgarism for hypertro- 

 phy of the nose. 



Poundal (po~wn'-dal) [AS., pund, pound]. A unit 

 of force ; that force which applied to a pound of matter 

 for one second generates in it a velocity of one foot 

 per second. P., Foot. See Poundal. 



Poupart's Ligament. See Ligament. 



Poverty (pov'-er-te) [ME., pervert ee, poverty]. The 

 state or condition of being poor. P. of the Blood, 

 a condition of the blood in which there is a deficiency 

 of the red corpuscles or of the coloring-matter of the 

 blood. P.-plants, a class of plants the names of 

 which relate either to the fact that they greatly injure 

 the farmer by impoverishing the soil, or to the ex- 

 tremely poor kind of soil in which they grow, e. g. , 

 Poverty (Polenionium caruleuni), Poverty-weed {Sper- 

 gitla arvensis), Hunger- weed {Ranunculus arvensis), 

 etc. 



Powder (pozv'-der) [ME., powder, powder]. Fine, 

 minute, loose particles, as of dust. See Pulvis. 

 P. of Algaroth, a powder prepared by adding 

 an excess of water to an aqueous solution of the 

 terchlorid of antimony. It is composed chiefly 

 of the oxychlorid of antimony. P., Aromatic, a 

 powder composed of cinnamon, ginger, and carda- 

 mom, with or without nutmeg. P., Bleaching. Syn- 

 onym of chlorinated lime. P.-blower, an apparatus 

 for blowing powder into cavities, as the ear, the nose, 

 the larynx, etc. P., Compound Chalk, a powder con- 

 taining prepared chalk, acacia and sugar. P., Com- 

 pound Effervescing. Same as P., Seidlitz. P., 

 Compound Licorice, a powder containing senna, 

 glycyrrhiza and sugar, with or without fennel and 

 wa-hed sulphur. P., Compound Morphin. Same 

 as P., T'ullys. P., Dover's, a diaphoretic and 

 sedative powder composed of powdered opium and 

 ipecac, each one part, and eight parts of sugar of 

 milk. P., Effervescing. See P., Soda. P., 

 Fever, of James. See Pulvis antimonialis. P., 

 Goa. See Chrysarobin. P., Gray. See Hydrar- 

 gyrum. P., Insect. See Insect Powder. P., James's. 

 Synonym of Pulvis antimonialis. P., Jesuits', pow- 

 dered cinchona, so-called because the Jesuit priests dis- 

 tributed it gratuitously to the poor. P., Knox's: 1. 

 Calx chlorata ; 2. A mixture of 3 parts calcium chlo- 

 rite (?) and 8 parts sodium chlorid. P., Pearl. Bis- 

 muth subnitrate. P., Ringworm. Synonym of 

 Chrysarobin. P., Seidlitz. See Potassium. (Pulv. 

 effervesc. comp.) P., Soda, a powder containing 

 sodium bicarbonate, 30 grains, and tartaric acid, 25 

 grains. P., Styptic, a powder containing alum, 

 gum acacia, and colophony, sometimes with the addi- 

 tion of argil and tragacanth. P., Talcum, powdered 

 soapstone, used often as a local application to in- 

 flamed surfaces. P., Tennant's, chlorinated lime. 

 P., Tully's, a powder composed of camphor, pre- 

 pared chalk, and licorice, 20 parts each, and morphin 

 sulphate, I part. It is used as a substitute for Dover's 

 powder. P., Vienna, potassa and lime. P., Vigo's, 

 red oxid of mercury. 



Power (po-w'-er) [ME., poer, power]. Strength; 

 energy. P., Absolute, the weight which must be 

 attached to a muscle to keep it from contracting when 

 stimulated. P., Combining, in chemistry, the num- 

 ber of hydrogen atoms with which an element is able 

 to combine. P., Mechanical, either of the elemen- 

 tary powers, the lever and the inclined plane, from 



