How come sometimes multiple-LP albums have sides 1 and 2 on different records and 3 and 4 on different records?
That is, one record has sides 1 and 4 and the other record has sides 2 and 3.
Not the most pressing question in the world but has always stumped me.
For stackable turntables.... play 1&2, flip both, play 3&4 Caveman Tech 
It was done so people with turntables with record changer spindles could stack one LP on top of the other and listen to sides 1 and 2 in running order so that side 1 would drop and play first and then side 2 would drop and play without the need for the listener to play side 1 first and then get up and turn the record over to side 2 which would be necessary if each LP was labeled with side 1+2 on one LP and sides 3+4 on the other.
https://en.wikipedia.org/wiki/Record_changer
[Edited on 1/27/2017 by Psy]
Back in the olden days, some stereos could stack multiple records for play. So you could stack AFE and it would automatically play sides 1 and 2. When finished, you flip those over and 3 and 4 would play.
My parents' console stereo could play 6 or so LPs in succession. They would prep records when they had parties and I would slip one of my Monkees records in the stack as a joke.
I have a James Brown 3 lp live set that has sides 1&6, 2&5, 3&4.
It's a pain in the ass to switch them manually but with the price of vinyl these days even if I had a stackable turntable I wouldn't stack the records.
