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<p>[QUOTE=&quot;moreotherstuff, post: 48758, member: 56&quot;]Well... the sphereotype specifically refers to &quot;a positive collodion picture, taken upon glass&quot;.&nbsp; The paragraph before that talks about using pressure to shape a plate over a curved surface.&nbsp; I did leap to the silly conclusion that that would not be a glass plate, but perhaps you know better.&nbsp; The purpose of both techniques (and I am reading them as 2 differing techniques) is to give each picture a &quot;spherical&quot; appearance.[/QUOTE]</p><p><br /></p>

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