The song is on Brenda Wootton's LP "Boy Jan...Cornishman", which was released in 1980. (Note : Brenda spelled her name with three "o's" and two "t's")

"Humphrey Davy" (Lyrics and music by Richard Gendall, copyright Sentinel Music)
Chorus : (sung after each verse)

There's lots of things that I can do..I'm Humphrey Davy
And oh, I am a clever boy..I'm Humphrey Davy
1
Monday I discover things like sodium and chlorine,
Mixing up my chemicals - the stink it is appalling !
This is potassium - found by Davy !
2
Tuesday is the day I make the safety lamp for miners,
Let them have it as a gift - they'll never get a finer !
This is magnesium - found by Davy !
3
Wednesday I go lecturing at the Royal Institution.
All the ladies love to watch me making up solutions !
This here is Faraday - found by Davy !
4
Thursday I make laughing gas and sniff it up my hooter,
Take a little overdose and nearly end my future !
This stuff is strontium - found by Davy !
5
Friday I go fishing in the river and the ocean.
Takes a mighty clever fish to 'scape our Davy's notion !
This stuff is barium - found by Davy !
6
Saturday's for travelling in Europe for pleasure,
Studying phenomena and fishing at my leisure.
This is a medal I got from Boney !
7
Sunday I write poetry and books - you should read them !
Science and philosophy and fishing - you should heed them !
I'm very clever you know - I'm Davy !


I hope that this is the song you remember hearing, Dennis. If you need any further information regarding this LP, please get back to me.

On the sleeve notes Brenda mentioned that one of her grandchildren was named after Davy and a rhyme of unknown origin about Davy's statue is also mentioned, as follows :

" Sir Humphrey Davy's kindly face,
Is turned away from Market Place
Towards St.Michael's Mount
So, if he do want to tell the time
He've got to wait till the clock do chime
Then he's forced to count"
LOL,
Anne XX