On the sliding rule. : The lines on the sliding rule are the same as those on Gunter's scale, a description of which may be found in page 47 of the Practical navigator ..

Select what you would like to download. If choosing to download an image, please select the file format you wish to download. Please note full document download may take several minutes (PDF only).

Certain download types may have been restricted by the site administrator.

Select the document elements you would like to include in the embed code.