Off topic:

Why is English so easy! Unchanged between now and then?!?!?! [Linked Image]

The Swedish books and documents are barely intelligble! Spelling is way different, grammar and style not like today and the words vocabulary quite unlike what I'm used to.

Even the latest, a 1955 book has different spelling and grammar. Look at this about subpanels:

"I Vapenrummet och i korridoren två trappor upp insattes taflorna i isolerade gjutjärnsskåp, hvilka inhöggos i muren, så att blott locken av dem blefvo synliga, övriga taflor i träskåp"

would have been written today as

"I vapenrummet och i korridoren två trappor upp sattes skåpen i isolerade gjutjärnsskåp som huggits in i muren så att bara locken var synliga. Övriga skåp sattes i träskåp."