Yes indeed! Thanks. 

Looking back through the TIGHAR forum , I see that a reflector for a kerosene fishing lamp was suggested last year.

http://ecofinderkenya.org/blog/wp-content/uploads/2012/02/100_3174.jpg

Obviously the items from the Pacific Islands would have fitted a lamp with a smaller central hole than that illustrated - perhaps a lantern with a wick.

Richard


-------- Original Message ----------

How about a headlight reflector?

 Harding Polk II
 [log in to unmask]

 -----Original Message-----
 From: Richard Wright 
 To: HISTARCH 
 Sent: Mon, Feb 8, 2016 11:32 pm
 Subject: ID of metal discs

 Three metal dish-shaped discs, with a large hole in their base, have
been found on Pacific islands and variously linked to Amelia Earhart's
Lockheed 10 aircraft that went missing in July 1937, fishing
equipment, and discs to keep rats from climbing up ships' mooring
ropes.

 http://tighar.org/smf/index.php/topic,1602.195.html

 I admit that only the search for Earhart's aircraft qualifies as
historical archaeology, but I am curious whether somebody on HISTARCH
might be able to throw some light on their function. They are each
some 20 cm in diameter.

 Other than what is on the TIGHAR link above, I know nothing about the
properties of these discs.

 Richard Wright