Splendid Prizes The first number of the Ninth Volume of the SCIENTIFIC AMERICAN will be issued on the 17th of September, We are grateful for the very liberal encouragement which we have received from our readers, and take this occasion to express to them our gratitude. We are also under many obligations to our cotemporaries for favorable notices. The next volume will be commenced with new and beautiful type, printed on paper manufactured expressly for this publication, of greatly increased weight and finer quality : thia item alone will Increase our yearly expenses over $3000 ; in addition to this we shall increase our piesent able Editorial force as it ia our intention to continue the Scientific American, "the leading and most reliable practical scientific journal in the United States'' It will continue the unfliuching advocate of all :uaeful improvements, and it will fearlessly expose all unreliable and deceptive schemes appertaining to its eharacter ; [in this respect it has gained a reputation superior to any other work of the kind in the world J The opening of the Crystal Palace in this city forma an object of rare public interest j we shall devote a full page of the paper every week to careful criticisms, reviews, and illustrations of the objects most worthy of attention. We hope to reniler this department especially interesting to all our readers, whether they visit the Pair or not. The copious and finely executed engravings of machinery, new inventions, etc.—the four hundred pages of valuable scientific and practical reading—the useful receipts —the full report of all the Patent Claims, and the reliable character of the journal on all branches within its field of labor—render it worthy of the support which it has so liberally received from its intelligent class of readers. The circulation of the Scientific American during the present volume has exceeded 18,000 copies per week. The edition on the new volume will be commenced with 23,000, which we feel confident will not be an over calculation. Subscribers, to ensure the numbers from the commencement of the volume, should send in their subscriptions early, as many were disappointed in not obtaining the complete set of the present volume. The Scientific American is in form suitable for binding, and each volume is accompanied with a full index of all the subjects, which renders it an Encyclopedia of Useful, Scientific, and Mechanical Information for present as well as future reference. Hoping to stimulate our readers to greater activity in spreading the circulation of the Scientific American, we offar the following Splendid Prizes for the largest list of mail subscribers sent in by the first of January next.— $100 will be given for the largest list. $75 for the second largest list. $50 for the third ditto. $45 for the fourth ditto. $40 for the fifth ditto. $35 for the Bixth ditto. $30 for the Beventh ditto. $-25 for the eighth ditto. $20 for the ninth ditto. $15 for the tenth ditto. $10 for the eleventh ditto. $5 for the twelfth ditto. The cash will be paid to the order of the successful competitors, immediately after January 1st, 1854. These prizes are worthy of an honorable and energetic competition, and we hope our readers will not let an opportunity so favorable pass without attention. Terms ! Terms! Terms ! One copy, for One Year $2 11 Six Months $1 Five copies, f orSix Months $4 Ten Copies fot Six Months for $3 Ten Copies for Twelve Months, $15 fifteen Copies for TwaWe Months, $22 Twenty Copies for Twelve Months, $23 Southern and Western Money takes at par for subscription*!, ot Post Office Stampii takes at thtir par value. Letters should be direoted (post-paid) to MTJNN& CO, 123 Fulton street, New york.