How do I make a \therefore in *plain tex* ?

[Steve Litt]

Philip Taylor (Hellenic Institute) said on Sun, 30 Apr 2023 07:40:14
+0100

>On 30/04/2023 04:16, Steve Litt wrote:

[snip]

>> Does anybody know how to make the \therefore symbol from the amssym
>> package grow and shrink with the math font?  
>\input amssym
>
>$ \therefore $
>
>\font \tenmsa = msam10 scaled \magstep 2

[snip remainder of source code]

Thanks Philip,

I'll try it tomorrow and report back.

SteveT

Steve Litt 
Autumn 2022 featured book: Thriving in Tough Times
http://www.troubleshooters.com/bookstore/thrive.htm