The theory of William Miller : concerning the end of the world in 1843, utterly exploded ; with some other essays on the same subject.

Mode of access: Internet.

An address delivered in the Tabernacle : before the Tippecanoe and other Harrison Associations, of the city of New York : at the celebration of the anniversary of the birth day of Washington : and the recent triumph of sound principles in the election of William Henry Harrison, to the Presidency of the U.S., Feb'y 22, 1841 /

Checklist Amer. imprints

A discourse delivered before the Society for the Commemoration of the Landing of William Penn. On the 24th of October, 1825. ...

Mode of access: Internet.

History of the rebellion in Ireland, in the year 1798 &c., containing an impartial account of the proceedings of the Irish revolutionists, from the year 1782 till the suppression of the rebellion.

Mode of access: Internet.

Papers illustrating the history of the Scots brigade in the service of the United Netherlands, 1572-1782;

Vol. 3 includes half-title: The remebrance, or The progress of a regiment commanded by my Lord Portmore in the year 1701 and 1702 ... giveing a true acount of al ther deeds and quartering the space of the ... by John Scot, souldier.

The writings of "Colonel William Byrd, of Westover in Virginia, esqr" /

The catalog of the library at Westover was probably made in 1777 just before the library was sold and appears to have been published in December of that year--Footnote, p. 413-14.

A pioneer outline history of northwestern Pennsylvania : embracing the counties of Tioga, Potter, McKean, Warren, Crawford, Venango, Forest, Clarion, Elk, Jefferson, Cameron, Butler, Lawrence, and Mercer : also a pioneer sketch of the cities of Allegheny, Beaver, Du Bois, and Towanda : my first recollections of Brookville, Pennsylvania, 1840-1843, when my feet were bare and my cheeks were brown /

Mode of access: Internet.

Elements of natural history, and of chemistry: being the second edition of the elementary lectures on those sciences, first published in 1782, and now greatly enlarged and improved,

Translated by William Nicholson.

Early recollections of Robert Hallowell Gardiner, 1782-1864.

Contains brief notices of the Hallowell, Gardiner, Vaughan, Dumaresq and Tudor families.

An exposition of the prophecies : supposed by William Miller to predict the second coming of Christ, in 1843. With a supplementary chapter upon the true scriptural doctrine of a millennium prior to the judgment /

Mode of access: Internet.

Colonial slavery. Letters to the Right Hon. William Huskisson, President of the Board of Trade, &c., &c. on the present condition of the slaves, and the means best adapted to promote the mitigation and final extinction of slavery in the British colonies.

Mode of access: Internet.

The biographical history of Sir William Blackstone, late one of the justices of both benches ... and A catalogue of Sir William Blackstone's work, manuscript, as well as printed. With a Nomenclature of Westminster-Hall. The whole illustrated with notes, observations, and references. Also, a preface and index to each part /

Includes index.

Biomechanical force displacement analysis of strength of fixation of tracker holding devices to bone in computer aided joint replacement

Computer aided joint replacement surgery has become very popular during recent years and is being done in increasing numbers all over the world. The accuracy of the system depends to a major extent, on accurate registration and immobility of the tracker attachment devices to the bone. This study was designed to asses the forces needed to displace the tracker attachment devices in the bone simulators. Bone simulators were used to maintain the uniformity of the bone structure during the study. The fixation devices tested were 3mm diameter self drilling, self tapping threaded pin, 4mm diameter self tapping cortical threaded pin, 5mm diameter self tapping cancellous threaded pin and a triplanar fixation device ‘ortholock’ used with three 3mm pins. All the devices were tested for pull out, translational and rotational forces in unicortical and bicortical fixation modes. Also tested was the normal bang strength and forces generated by leaning on the devices. The forces required to produce translation increased with the increasing diameter of the pins. These were 105N, 185N, and 225N for the unicortical fixations and 130N, 200N, 225N for the bicortical fixations for 3mm, 4mm and 5mm diameter pins respectively. The forces required to pull out the pins were 1475N, 1650N, 2050N for the unicortical, 1020N, 3044N and 3042N for the bicortical fixated 3mm, 4mm and 5mm diameter pins. The ortholock translational and pull out strength was tested to 900N and 920N respectively and still it did not fail. Rotatory forces required to displace the tracker on pins was to the magnitude of 30N before failure. The ortholock device had rotational forces applied up to 135N and still did not fail. The manual leaning forces and the sudden bang forces generated were of the magnitude of 210N and 150N respectively. The strength of the fixation pins increases with increasing diameter from three to five mm for the translational forces. There is no significant difference in pull out forces of four mm and five mm diameter pins though it is more that the three mm diameter pins. This is because of the failure of material at that stage rather than the fixation device. The rotatory forces required to displace the tracker are very small and much less that that can be produced by the surgeon or assistants in single pins. Although the ortholock device was tested to 135N in rotation without failing, one has to be very careful not to put any forces during the operation on the tracker devices to ensure the accuracy of the procedure.

Influences of accommodation and myopia on the foveal Stiles-Crawford effect

We determined the foveal Stiles-Crawford effect (SCE) as a function of up to 8D accommodation stimulus in six young emmetropes and six young myopes using a psychophysical two-channel Maxwellian system in which the threshold luminance increment of a 1 mm spot entering through variable positions in the pupil was determined against a background formed by a 4 mm spot entering the pupil centrally. The SCE became steeper in both groups with increasing accommodation stimulus, but with no systematic shift of the peak. Combining the data of both groups gave significant increases in directionality of 15-20% in horizontal and vertical pupil meridians with 6D of accommodation. However, additional experiments indicated that much of this was an artefact of higher order aberrations and accommodative lag. Thus, there appears to be little changes in orientation or directionality in the SCE with accommodation stimulus levels up to 6 D, but it is possible that changes may occur at very high accommodation levels