LEGEND TO THE ILLUSTRATIONS, SEE BELOW Print Specifics: Type of print: Intaglio, steel engraving - Original antique print Year of printing: not indicated in the print - actual: 1844 Publisher: Johann Georg Heck Condition: 1-2 (1. Excellent - 2. Very good - 3. Good - 4. Fair). I received this unique print in a condition similar to the one (NOT INCLUDED) shown in the last photo. To save this print, I had it cleaned and various stains etc removed. Dimensions: 9 x 11.5 inches, (23 x 29 cm) including blank margins (borders) around the images. Paper weight: 3 (1. Thick - 2. Heavier - 3. Medium heavy - 4. Slightly heavier - 5. Thin) Reverse side: Blank Notes: Green color around the print in the photo is a contrasting background on which the print was photographed. Print detail is much sharper than the photo of the print. Photos show the overall view of the print and an enlarged detail. Legend to the illustrations: PUMPS: Figure 1. A lift pump 2. A forcing pump 3-6. Stephenson's double action pump 7-9. Pump used in the mine Huelgoet in Normandy 10-12. Letestu's pump 13, 14. Jordan's hydraulic ram in Clausthal 15-21. Reichenbach's hydraulic ram in the saltworks at Illfang in Bavaria. Martin2001 Satisfaction Guaranteed Policy! Any item purchased from me may be returned for any (or no) reason for a full refund including all postage. Internet seller since 1998. Five-star service.