'as time goes by' continued

Yesterday I posted an excerpt from the lyrics of Herman Hupfield's 1931 song. I had looked at several sources for lyrics, including some discussion regarding how different performers had sung slightly different versions. The version I posted had one word that a performer reportedly switched from Hupfield's original work. It included the phrase 'things like third dimension'. From what I can weave together, it seems the original version was 'things like 4th dimension'. This would make sense as many people consider time to be the 4th dimension, and the name of the song is, after all, 'As Time Goes By'.

This day and age we're living in
Gives cause for apprehension
With speed and new invention
And things like 4th dimension
Yet we get a trifle weary
With Mr Einstein's theory
So we must get down to earth
At times relax, relieve the tension
No matter what the progress
Or what may yet be proved
The simple facts of life are such
They cannot be removed

You must remember this
A kiss is still a kiss
A sigh is just a sigh
The fundamental things
apply as time goes by...