See also:

• OBIT (through O. Fr., from Lat. obitus, death, obire, to go down, to die)

OBIT (through O. Fr., from See also:

• LAT

Lat. obitus, See also:

• DEATH

death, obire, to go down, to See also:

• DIE
• DIE (Fr. de, from Lat. datum, given)

die)  , a See also:

• TERM

term for See also:

• DEATH

death, formerly used for the See also:

• ACCOUNT
• ACCOUNT (through O. Fr. acont, Late Lat. comptum, cornputare, to calculate)

account 2 The last See also:

• HISTORY

history of See also:

• HUGO, GUSTAV VON (1764–1844)
• HUGO, VICTOR MARIE (1802-1885)

Hugo of See also:

• TOUL

Toul (12th See also:

• CENTURY (from Lat. centuria, a division of a hundred men)

century) was the authority of Jacques de Guyse (14th century) in his Annales historiae princip . Hannoniae (Mon . Germ. See also:

• XXX

xxx.), where there is an account (bk. ix. ch . 6) of Alberich . of any curvature to within an See also:

• ERROR (Lat. error, from errare, to wander, to err)

error of nth% of the See also:

• RADIUS

radius: male and See also:

• FEMALE

female templets being used for very deep curves, and the See also:

• SPHEROMETER (Gr. ocPaipa , a sphere, p rpov, a measure)

spherometer for tools of longer radii (by appropriate grinding together, the radii are alterable at will within narrow, but sufficient, limits) . The accuracy attained in the grinding, however, is open to very perceptible modification by the subsequent polishing and figuring processes . This is particularly undesirable in the See also:

• CASE
• CASE, JOHN (d. 1600)

case of deep curves and large apertures . A variation in a radius of curvature may occasion a little spherical See also:

• ABERRATION (Lat. ab, from or away, errare,, to wander)

aberration at the axial See also:

• FOCUS (Latin for " hearth " or " fireplace ")

focus, but if the amount be small it may be neutralized by imparting to the See also:

• LENS
• LENS (from Lat. lens, lentil, on account of the similarity of the form of a lens to that of a lentil seed)

lens a parabolic See also:

• FORM (Lat. forma)

form or its opposite . Such an artifice is frequently adopted in correcting large See also:

• TELESCOPE

telescope objectives . With See also:

• OPTICAL

optical systems which transmit large pencils with considerable obliquity (such as wide See also:

• ANGLE (from the Lat. angulus, a corner, a diminutive, of which the primitive form, angus, does not occur in Latin; cognate are the Lat. angere, to compress into a bend or to strangle, and the Gr. ayKOS, a bend; both connected with the Aryan root ank-, to

angle photographic objectives) the curves are very deep, and a departure from the true radius which would be tolerated in a telescope cannot be permitted here . Such lenses are usually tested by means of a See also:

• MASTER (Lat. magister, related to tnagis, more, as the corresponding minister is to minus, less; the English form is due partly to the O. Eng. maegister, and partly to O. Fr. maistre, mod. maitre; cf. Du. meester, Ger. Meister, Ital. maestro)

master See also:

• CURVE (Lat. curvus, bent)

curve worked in See also:

• GLASS
• GLASS (O.E. glees, cf. Ger. Glas, perhaps derived from an old Teutonic root gla-, a variant of glo-, having the general sense of shining, cf. " glare," " glow ")
• GLASS, STAINED

glass . The master curve is fitted to the experimental lens, and an inspection of the interference fringes shows the quality of the See also:

• FIT

fit—whether it be perfect, or too shallow or too deep .

The workman then modifies his polisher or stroke in See also:

• ORDER
• ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
• ORDER, HOLY

order to correct the divergence . See also:

• FLAT (a modification of O. Eng. flet, an obsolete word of Teutonic origin, meaning the ground beneath the feet)

Flat surfaces are tested similarly . This test by contact has been strongly advocated and has been regarded as sufficient to detect all irregularities of any moment . This claim, however, is not justified, for the test is not sensitive to errors sufficient in amount to render a telescope See also:

• OBJECTIVE, or OBJECT GLASS

objective almost valueless; but such errors are easily discernible by other optical devices . In See also:

• GENERAL
• GENERAL (Lat. generalis, of or relating to a genus, kind or class)

general, accuracy in the radii of curvature is of See also:

• PRIMARY

primary importance and trueness of figuring is of secondary importance in photographic objectives, while the See also:

• REVERSE

reverse holds with telescopic objectives; in wide angle microscopic objectives these two conditions are of equal moment . See also:

• EYE
• EYE (O. Eng. edge, Ger. Auge; derived from an Indo-European root also seen in Lat. oc-ulus, the organ of vision (q.v.)

Eye pieces do not require the same degree of accuracy either of a See also:

• PERSON, OFFENCES AGAINST THE

person's death (now " obituary ") . An " See also:

• OBIT (through O. Fr., from Lat. obitus, death, obire, to go down, to die)

obit " was also a service performed at a funeral or in See also:

• COMMEMORATION

commemoration of a dead person, particularly the founder or benefactor of a See also:

• CHURCH
• CHURCH (according to most authorities derived from the Gr. Kvpcaxov [&wµa], " the Lord's [house]," and common to many Teutonic, Slavonic and other languages under various forms—Scottish kirk, Ger. Kirche, Swed. kirka, Dan. kirke, Russ. tserkov, Buig. cerk
• CHURCH, FREDERICK EDWIN (1826-1900)
• CHURCH, GEORGE EARL (1835–1910)
• CHURCH, RICHARD WILLIAM (1815–189o)
• CHURCH, SIR RICHARD (1784–1873)

church, See also:

• COLLEGE (Collegium)

college or other institution, hence "obit-days," "obit See also:

• SUNDAY

Sunday," &c . A "See also:

• POST

post-obit" is a See also:

• BOND
• BOND, SIR EDWARD AUGUSTUS (1815-1898)

bond given as a See also:

• SECURITY (Lat. securus, free from care, safe)

security for the repayment of See also:

• MONEY

money See also:

• LENT (0. Eng. lenclen, " spring," M. Eng. lenten, lente, lent; cf. Dut. lente, Ger. Lenz, " spring," 0. H. Ger. lenzin, lengizin, lenzo, probably from the same root as " long " and referring to " the lengthening days ")

lent upon the death of a person from whom the borrower has expectations (see Boxn) .