Get Discount 5% Off
Subscribe to our newsletters now and stay up-to-date with new arrivals, updates and deals.
Nouveau moyen de préparer la couche sensible des plaques destinées à recevoir les images photographiques - Lettre à M. Arago
Vous avez bien voulu annoncer l'Acadmie que j'tais arriv, par une suite d'expriences, reconnatre d'une manire certaine que, dans l'tat actuel de mon procd, la couche sensible la lumire tant trop mince, elle ne pouvait fournir toute la dgradation de teintes ncessaire pour reproduire la nature avec relief et fermet; en effet, quoique les preuves obtenues jusqu' ce jour ne manquent pas de puret, elles laissent, quelques exceptions prs, beaucoup dsirer sous le rapport de l'effet gnral et du model[1]. C'est en superposant sur la plaque plusieurs mtaux, en les y rduisant en poussire par le frottement et en acidulant les espaces vides que laissent leurs molcules, que je suis parvenu dvelopper des actions galvaniques qui permettent l'emploi d'une couche d'iodure beaucoup plus paisse sans avoir redouter, pendant l'opration de la lumire dans la chambre noire, l'influence de l'iode devenu libre. La nouvelle combinaison que j'emploie, et qui se compose de plusieurs iodures mtalliques, a l'avantage de donner une couche sensible qui se laisse impressionner simultanment par toutes les valeurs de ton, et j'obtiens ainsi, dans un trs-court espace de temps, la reprsentation d'objets vivement clairs avec des demi-teintes qui conservent toutes, comme dans la nature, leur transparence et leur valeur relative. ......Buy Now (To Read More)
Ebook Number: 16260
Author: Daguerre, Louis Jacques Mandé
Release Date: Jul 11, 2005
Format: eBook
Language: French
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Subscribe to our newsletters now and stay up-to-date with new arrivals, updates and deals.
Thanks for subscribing!
This email has been registered!
Product | SKU | Description | Collection | Availability | Product Type | Other Details |
---|