ZETA. _For notices of Mother Shipton, see_ "N. & Q.," Vol. v., p. 419. C. W. B. _Is our Correspondent quite certain there was a naval engagement, as the words of the pedigree simply state that he was on board when he died, in command of a body of Marines?_ J. D. _The wedge-shaped baths of glass, originally recommended by_ MR. ARCHER, _are certainly the best. They are economical in use and very cleanly. They may, no doubt, be procured from_ MR. ARCHER. _The one we have in we got at Hockin's. There is little doubt that if, when properly constructed, they were sold at a reasonable price, they would entirely supersede baths of gutta percha._ B. P. (Warrington). _We have often answered the question before. Precipitate the silver in the form of a chloride by means of common salt; put this into a crucible with twice or thrice the quantity of common carbonate of soda: The crucible being exposed to a strong heat, the metallic silver will form in a button at the bottom of the crucible. 2. Use a bath of thirty grains of nitrate of silver to the ounce, and drop into it a few drops of nitric acid, sufficient to turn litmus paper red. 3. A glass bath is far preferable to gutta percha._ E. W. (A Beginner). _1. In all printing of positives it is needful to salt the paper; when albumenized paper is used it is combined with the albumen. 2. We have for many reasons entirely discarded the ammonio-nitrate of silver. We have seen very few positives produced by it which are permanent. 3. Sel d'or causes a sort of plum colour, which is much admired by some; intensity of light alone will not produce certain tints. We have met with uniform success by trusting to the formula given in_ "N. & Q." _by_ DR. DIAMOND (Vol. viii., p. 324.), _and its ease in manipulation has alone much to recommend it. 4. Proofs should be left in the hypo, until they are quite clear and transparent when held up to the light, looking like a piece of Chinese rice-paper. They at first change to a reddish-brown upon immersion, but if sufficiently printed that soon departs and becomes a very rich tint, the thin Canson's paper giving best. As a beginner we will forward you a small specimen of the color obtained._ OUR EIGHTH VOLUME _is now bound and ready for delivery, price 10s. 6d., cloth, boards. A few sets of the whole Eight Volumes are being made up, price 4l. 4s.--For these early application is desirable._ "NOTES AND QUERIES" _is published at noon on Friday, so that the Country Booksellers may receive Copies in that night's parcels, and deliver them to their Subscribers on the Saturday._ * * * * * This Day is published, fcp. 8vo., 2s. 6d. cloth. THE GREAT SACRIFICE; or, THE GOSPEL ACCORDING TO LEVITICUS. By the REV. JOHN CUMMING, D.D. *** This forms the First COMPANION VOLUME to the SABBATH MORNING READINGS. London: John F. Shaw, Southampton Row, and Paternoster Row. * * * * *