Print  Specifics: Type of print: Copperplate engraving - Scarce original antique print: Year of printing: not indicated in the print. Actual: 1778 (indicated on the source's title page) Publisher: London, Printed for the Authors Rev. Erasmus Middleton, W. Turnbull, T. Ellis & J. Davison Condition: 2-3 (1. Excellent - 2. Very good - 3. Good - 4. Fair). Slight wrinkling and brownish tint with the area of an old dampstain. Examine the photos for extent. Dimensions: 8.5 x 13.5 inches (22 x 34 cm)  Paper weight: 3 (1. Thick - 2. Heavier - 3. Medium heavy - 4. Slightly heavier - 5. Thin) Reverse side: Blank Note: 1.  Green 'border' around the print in the photo is a contrasting background on which the print was photographed. 2. The print detail is sharper than the photo of the print. 3. Photos show the front and back of the print. Legend: Illustrations include: CURRENTS: Fig. 2,3.  in hydrography, is a stream or flux of water in any direction. Currents in the sea are either natural and general, arising from the diurnal rotation of the earth on its axis ; or accidental and particular, caused by the water’s being driven again!! promontories, or into gulphs and freights; where, wanting room to spread, they are driven back, and thus disturb the ordinary flux of the sea. (Fig. 1.) in navigation, are certain settings of the stream, causing all bodies moving therein to alter either their direction or velocity, or both ; whereby their motions become compounded of their own velocity and the letting of the current. CROSS-STAFF:  a mathematical instrument used to take the fun’s altitude. This instrument consists of a staff and four crosses. CYLINDER CYCLOID CONJUGATE HYPERBOLAS DIAMETER CUPPING:  in surgery, the operation of applying cupping-glasses for the discharge of blood, and other humours by the skin. DIAGONAL: in geometry, a right-line drawn across a parallelogram, or other quadrilateral figure, from the vertex of one angle to that of another. DESIGNING: the art of delineating, as drawing the appearance of natural objects, by lines on a plane. several methods of deigning mechanically. The following is that of the learned Sir Christopher Wren, and may be put in practice with the greatest ease (fig. 13). DIPPING NEEDLE:  (fig. 14.) a long straight piece of steel equally poised upon an axis parallel to the horizon, and afterwards touched with a loadstone, in order to discover the exact tendency of the magnetick virtue. A needle placed in this manner will dip below the horizon, or the touched part of them directed to a point within the earth’s surface ; whence the name. Martin2001 Satisfaction Guaranteed Policy! Any print 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.