First of all there are no JW books pre-1900 they were not even in existence at the time, they didn't formed as an organization until 1931.
“The Bible Students are an interesting group. I attended a few of their meetings as I was coming out of Jehovah’s Witnesses, and found them to be very likable people, though they suffer from many of the same errors as Jehovah’s Witnesses. When it comes to major doctrines, they are pretty much on the same page as Jehovah’s Witnesses. They believe that Jesus is a created being, that the dead are unconscious, and
that salvation involves a combination of faith and works and can be lost, etc. For that reason, I can’t endorse their teachings or recommend them as a source of biblical knowledge."
The forgoing is a quote from the website you refer, the first thing we learn from the writer is that he was an X-JW most X-JW’s after having had a bad experience with the organization develop a distaste for most other religious bodies. One would naturally think it strange if they didn’t, and most especially for any other body which shared some of the same similar beliefs as the one which they just left.
As for the quote: Our friend here most likely having previously been indoctrinated into the teaching of orthodoxy would naturally see anything taught in contrast to what orthodoxy teaches as error. One of two things is evident here either he wasn’t a JW for very long or he had poor teachers. Most of the doctrines listed are what we Bible Students define as first principle doctrines, doctrines which should, which must be properly understood if one is to progress from the milk of the word to meat of the word. The fact that he had not been able to grasps these basic principles implies that he either was not spirit begotten or that if he was he was merely a “
babe” and still needed instruction.
We would like to say that in regards to the last point (underlined), the only ones presently who can lose their salvation at this time are the spirit begotten; those who have been released from the original sentence, these are the only ones presently on trial for life and as such subject to the “
second death”. The rest of the world and this includes the mere nominal professing Christian have not yet been release from the first sentence, the first death and therefore are not subject to the second death. In the next age once the ransom has been applied to them then they will stand or fall on their own accord, and each
will be judged according to their works (
Rev 20:13).