made of 同made from的分別

1. made of指由某種原料製成，
例如：
The shirt is made of silk.
這件恤衫是絲織品。

2. made from 亦指由某種原料製成，但強調製作過程複雜，
而從 製 成品中或已看不到最初原料的蹤跡.

例如：
Aluminum is made from bauxite.
鋁是從鋁土岩提煉出來的。

2008-01-27 14:23:25 補充：
********* 100% correct ****************.

made of = 用某材料製造 ( wood / plastic )
made from = 在某地製造 ( 非正式 , 正式 : made in )( China / Japan )

made of : This table is made of wood.
made from ( made in ) : That packet of candies are made in China.

made of 是指用什麼東西做出來 (e.g wood silk plastic ...etc )
made from 由那裡或什麼東西做出來 (e.g wood silk plastic ...or HK China.. )
made in 在那裡做 (一定填地方名 )

若果那件東西若沒有改變質地，則用made of；若改變了本質就用made from
如：
The table is made of wood.（成了枱後，仍然是木）
Wine is made from grape.(成酒後，改變了質地，不再是葡萄）
Cheese is made from milk.(成芝士後，就不再是奶，質地改變了）
希望幫到你！

2008-01-26 23:20:13 補充：
其實蘋果日報的【征服英語】曾經講過；可參考以下網址http://education.atnext.com/index.cfm?fuseaction=Article.View&articleID=6273378&issueID=20060901

made of :在哪裡生產
made from: 由甚麼物質做成

same thing ar

made of o既意思係由d咩做
made from就係o係where做
不過多數d人會use " made in "

only used in " made of "