





L . Abnormal rting 



the 



tficult. 



are 

 False 

 1. lndu< ■ I 



in.-tru- 

 I Metastatic, 



auk 

 - ■ 



L., 

 Physiologic 



inism. L., 



L . Pathologic, 



eak- 



- "i 

 i... Postponed, fond 



•'rematur- the 



tus i^ vial 



i£CS of. nod "' 



Llld 



ild ; the 



the pla- 



;... NV in by which 



;li canal and 



L -j f, or the contrac- 



L., Perverse, labor 



I the child. 



i of the 



•• ith undue celer- 



1 . Protracts nd the 



. .--I' hours in 

 L., Spontaneous, lal mplished 



Lai mm, from labor- 



d for experi- 



Method. nis of. L.'s 



r Tea turn 



lipped]. 



sually the 

 the 





•mni]. Also 

 abur- 



alka- 



1 



r com- 



I-., Cortical, 



LACCIN 



substance of the kidney. See Kidney. L., Mem- 

 branous, the membranous cavity within the osseous 

 labyrinth, from which it is partly separated by the 

 ivmph. It comprises two sacs contained within 

 the vestibule, the semicircular canals and the canal of 







Labyrinth of im-. Ear Laid Open. 



a. Fovea elliptica. 6 Fovea hemispherica. c. Common en- 

 trance of the posterior ami superior semicircular canals. 

 d. Opening of the aqueduct of the vestibule, e. Superior 

 icircular canal, f. Posterior, g. Inferior semicircular 

 //. Spiral canal of cochlea, i. Opening of the aque- 

 duct of the cochlea, j. Lamina spiralis. 



the cochlea. L. of the Kidney. See Labyrinth,' 

 tical. L., Osseous, the bony capsule of the internal 

 ear, communicating in front with the cochlea and be- 

 hind with the semicircular canals. L. Pit. See Ear. 

 Labyrinthal (lab-ir-in* -thai}, Labyrinthic (lab-ir-in'- 



thik). See Labyrinthine. 

 Labyrinthine (lab-ir-in' -thin) [laji'vptvdoc, a maze]. 

 Pertaining to a labyrinth. L. Vertigo. See Mbti&re's 

 Disease. 

 Labyrinthus [lab-ir-in' -thus) [L. : pl.,Labyrintht\. A 



labyrinth. 

 Lac (lak) [Pers., lak, lac]. A resinous incrustation 

 produced on the bark of the twigs and branches of 

 various tropical trees (Urostigma religiosa, Mimosa 

 cinerea, Butea frondosa, Schleichera irijuga, of 

 < Vvlon, India, and Burniah, Croton lacciferum, of 

 Ceylon, Croton draco, Acacia greggii, Larrea mexi- 

 cana, of Mexico), by the puncture of the female lac- 

 insect Carteria (Coccus) lacca. This crude exudation 

 constitutes the stick-lac of commerce. Shellac is pre- 

 pared by spreading the resin into thin plates after 

 being melted and strained. In the preparation of the 

 shellac, the resin is freed from the coloring-matter, 

 which is formed into cakes, and is known as lac- 

 dye. See Pigments , Conspectus of . Button-lac differs 

 from shellac only in form, appearing in cakes about 

 three inches in diameter and one sixth of an inch thick. 

 Bleached lac is prepared by dissolving lac in a 

 boiling lye of pearlash or potassic hydrate, filter- 

 ing and passing chlorin through the solution until 

 all the lac is precipitated. Seed-lac is the residue ob- 

 tained after dissolving out most of the coloring-matter 

 contained in the resin. The common shellac is used 

 in varnishes, lacquers, and sealing-wax ; the bleached 

 lac in pale varnishes and light-colored sealing-wax. 

 L.-beet, a fruit used in Siam for diarrhea and 

 pepsia. L., Stick, lac as taken from the twigs 

 which it is formed. L. sulphuris, milk of sul- 

 phur ; sulphur prsecipitatum (U. S. P.) L., White. 

 Sec /.',' ,/, hed lac. 



Lacca (lak'-ah). See Lac. 



Laccate [Pers., lak, lac, or sealing-wax]. 



In biology, appearing as if varnished or lacquered. 



Laccin (lak' -in \ [Pers., lak, lac]. A substance resem- 

 bling wax, extracted from lac. It is insoluble in water, 

 soluble in alcohol, in ether, in hydrochloric acid, and 

 in potassic hydr: 



