This work contains twenty-six complete alphabets, and from seventy to eighty initial letters of a larger and more elaborate character, the whole forming a series of specimens of almost every type to be found from the beginning of the tenth to the end of the seventeenth century. To these have been added examples of the various forms of Arabic numerals in use from their first introduction in this country, and also a series of labels, monograms, heraldic devices, and other matters of detail, calculated to render it most useful as a work of reference. WILLIAM PICKERING, 177. Piccadilly. * * * * * WORDSWORTH ON THE CHURCH OF ROME IN THE THIRD CENTURY. In 8vo., price 8s. 6d. ST. HIPPOLYTUS AND THE CHURCH OF ROME, in the EARLIER PART of the THIRD CENTURY; from the newly-discovered "Philosophumena;" or, the Greek Text of those Portions which relate to that subject; with an ENGLISH VERSION and NOTES; and an Introductory Inquiry into the Authorship of the Treatise, and on the Life and Works of the Writer. By CHR. WORDSWORTH, D.D., Canon of Westminster, and formerly Fellow of Trinity College, Cambridge. RIVINGTONS, St. Paul's Church Yard, and Waterloo Place. * * * * * Just published, pp. 720, plates 24, price 21s. A HISTORY of INFUSORIAL ANIMALCULES, living and fossil, with Descriptions of all the Species, and Abstracts of the Systems of Ehrenberg, Dujardin, Kützing, Siebold, &c. By ANDREW PRITCHARD, ESQ., M.R.I. Also, price 5s., A GENERAL HISTORY OF ANIMALCULES, with 500 Engravings. Also, price 8s. 6d., MICROGRAPHIA, or Practical Essays on Microscopes. London: WHITTAKER & CO., Ave Maria Lane. * * * * * Printed by THOMAS CLARK SHAW, of No. 15. Stonefield Street, in the Parish of St. Mary, Islington, at No. 5. New Street Square, in the Parish of St. Bride, in the City of London; and published by GEORGE BELL, of No. 186. Fleet Street, in the Parish of St. Dunstan in the West, in the City of London, Publisher, at No. 186. Fleet Street aforesaid.--Saturday, April 2. 1853.