S E M ( 800 ) SEN
individual whose children have fallen inthe service; audit sometimes happens,that individuals are obliged to quit thearmy without being able to take advan-tage of the market.
SELLA imperatoria vel castrensis, achair of state, made of carved ivory,which the Roman generals used in thefield, and which was afterwards con-verted into the Imperial throne.
SELLA IS DER, a dry scab in a horse’shoof, or pastern.
SELLE , Fr. a saddle. See Boute-
SELLE.
Selle rase, Fr. a saddle without abow.
Selle a areon, Fr. a bow-saddle.
Fvt de Selle, Fr. See Tree of aSaddle.
SELLERIE, Fr. a place appropriatedfor horse harness.
SELLETTE, Fr. a stool; also a pad,or saddle, for a cart-horse. Likewise astool on which the prisoner sits, inforeign countries, during bis trial.
Sellette, Fr. in mechanics, a pieceof wood placed near the top of the pin oftin engine, or machine, upon which twohold-fasts are fixed that sustain the crossbeam which carries the pullies.
SEMBLABLES, Fr. in geometry,similar, alike, equal. This term is ap-plied to any two figures, the sides ofone of which correspond with the sidesof the other, and are always in thesame ratio. So that semb/abte, or alike,only means, in this sense, equal. Twocircles, though unequal in their sizes,may still be alike ; that is, their severalparts may agree according to a certainratio.
SEMELLE, Fr. lee-board.
Semelle, Fr. a sort of beam uponwhich certain parts of a roof are kepttogether, in order to prevent them fromwidening out.
Semelle d'etaie, Fr. a piece of tim-ber, which is laid beneath the foot of aprop, &c.
Semelle, Fr. in artillery, the end ofa thick plank, which is laid betweenthe two cheeks of a gun-carriage, andupon which the camion rests.
Les SEMELLES, Fr. the axle-treesbelonging to the carriage of a gun. TheFrench also call them les aissieux.
SEMESTRE, Fr. This word lite-rally signifies a term of six months; butit is generally understood to express anyterm of leave of absence which is granted
to officers, or soldiers. With respect t»the latter, it means furlouuh.
SEMESTR1ER, Fr. “ This termcomes from the word Semestre, andsignifies the person who has leave ofabsence, or who goes on furlough.
SEMICIRCLE, part of a circle di-vided by the diameter.
SEMIDIAMETER, half of the linewhich divides a circle into twoequal parts.
Semidiameteis of the globe of com-pression , in mining. This is the dis-tance from the center of the chamberof the mine, to the circumference of theexcavation, made by the explosion, orspringing, of the mine, and is estimatedto be equal to the hypotlienuse of aright angled triangle, whose other twosides are the line of least resistance, andthe semidiameter of the excavation.
SEMIORDINATE, a line drawn atright angles to be bisected by the axis,and extending from one side of the sec-tion to the other.
Vieille SEMPITERNELLE, Fr. theold trot.
SENAU, Fr. a small skiff, or tender,calculated for quick sailing.
SENfiCIIAL, Fr. This is the mostancient of all the titles or dignitieswhich were attached to those indivi-duals that undertook the command ofarmies, when the Kings of France , be-longing to the second race, ceased to goin person. The Senechal was selectedby the sovereign from among those vas-sals and subjects, who were highest innobility, and were most distinguishedfor their rank, wealth, and talents. Thetitle of grand Senechal of France wasfirst created by Lotharius, in 928, andconferred upon Geoffrey, Count of Anjou,surnamed Grisegonnelle. This rank, orsituation, continued to be attached tothe Count of Anjou, until the reign ofPhilip Augustus , in whom it was extin-guished, when he ascended the throne ofFrance , in 1121. The grand Senechallikewise exercised the functions of LordSteward of the King’s household; hayingunder him several subordinate senechals,who also held places of considerabletrust. These were called S'enechaux deFrance, Senechals of France .
SEIsFiCHALE, Fr. the seneschal’swife or lady.
SEN S-dessus-dessoits, Fr. topsy-turvy,
SEan-devant-derri'ere, Fr. wrong way.
SENIORITY, in military matters, isthe difference of time betwixt the raising