Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Why a silver index scale?
    From: David Pike
    Date: 2016 Mar 27, 02:41 -0700

    why was Hughes & Son still using silver arc during the 1940s when these regards were certainly not true any more. Silver is expensive. Pewter, on the other hand, is a lot cheaper and would (I submit) do the job just as well...?

    Perhaps they’d always done it that way; perhaps they were using up old stock.  Was there less of a real or 'manufactured’ war need for silver compared to other metals like aluminium to build Spitfires?  Did it eventually become too hard for Hughes to source any more? I don’t know.  Also, there’s soft, and there’s too soft.  You want a metal soft enough to make the instrument maker’s task relatively easy, but not so soft that it picks up every scratch.  Compare an engraved silver serviette ring with an engraved pewter tankard after several years use.  Still, it's nice to know that the shiny stuff on my 1940s Hughes Mates sextant is really silver.  DaveP
       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site