_Use._ To one ounce water, add from fifteen to thirty drops quick; coat over an incipient rose; over quick, nearly change the color to fair rose; recoat about one-third or one-fourth as long as at first coating. The coating box should be charged strong enough to change the plate in from _one_ to _four seconds_. One advantage this mixture possesses, it will work in one-half the time required for any of the foregoing combinations. One very serious objection to its use is, it cannot, without great care, be made to work with certainty; and another objection is, it will not last long, as the box will require to be replenished after having coated from _eight_ to _fourteen_ plates. The older, however, this mixture is, the more certain in its operation. We have one gallon which has been made _two years_. No. 5. _Dry Quick._ We have already given this preparation in a former number of this Journal. No. 6. _Acidulated Quick._ Water, one pint: bromine, ten drops; chloride of iodine, forty drops; nitro-muriatic acid, one-fourth ounce; sulphuric acid, two drops. _Use._ One part quick to ten parts water; coat over iodine to orange; over quick to rose red; recoat one-fourth. There are thousands of different combinations and agents employed, and, after all, let every Daguerreian make up his mind to first _become acquainted_ with some _good_ combination of bromine and iodine, there will be less complaining of _Quicks_. _Money received since our last Number._ W. A.; M. R.; F. S. H.; J. W. O.; S. B. D.; H. O. N.; T. O.; J. H. F.; S. B. B.; M. P. B.; A. B.; J. H. V.; W. A. J.; J. E. M.; M. M.; H. H. L.; J. W. H.; S. N. R.; N. E. S.; R. B. A.; H. S. B.; D. C.; T. C. D.; C. H. G.--each $2. G. & B.; D. McD.; S. P.; M. S. U.; C. T. M.; S. S.; W. R. R.; S. B. jr.; E. N. H.; C. W. T.; J. M.; S. H.; N. C.; C. M. H.; J. B.; J. B. R.; W. O. G.; N. P. S.; L. O.; A. T.; W. S. W.; N. E. R.; D. G. K.; L. Q. V.; H. K.; Y. M.; A. G.; U. B.; D. A. N.; V. T.; W. O. O. V.--each $3. S. B. & CO.; M. & B.; P. C.; T. C. D.; S. & S.; H. & M.; M. W. N.; G. D. A.; J. S.; A. T. W.; M. A. H.--each $5. N. E. S.; T. C. D.--each $10. M. S. $15. B. F. $34. * * * * * ANSWERS TO CORRESPONDENTS. W. O. R., Mo., Mr. R. writes--"Will you have the kindness to inform me of any new process for preparing phosphate of iron. I make the request more particularly to obtain a process by one Mr. Routh, who I understand has a new process." The preparation referred to by Mr. R., was read before the London Medical Society, January 11, 1851, by Dr. Routh, at which time he exhibited specimens of phosphate of iron made by dissolving the ordinary phosphate in meta-phosphoric acid, and by then evaporating to degrees. It has been found that this form of iron is exceedingly useful in cases where iron is desired.