Word Count
Word counts range from about 11,000 to over 800,000. For example, 'Books Relating to Applied Science' has 11,322 words, while 'Modern Machine-Shop Practice' has 801,590.
Compare 2 or 3 books
Search this site's catalog and put books side by side. The tool compares measurable metadata and text statistics so you can see practical differences without turning them into a subjective quality ranking.
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What this comparison can tell you
The Compare tool lets you place up to three books side by side. For each book, you can see its word count, estimated reading time, and the subjects it covers. This makes it easier to decide which work might be more suitable for your needs, without having to open each one.
The comparison is based on catalog metadata only. It does not rate the quality of the books. Instead, it highlights differences in length, scope, and subject focus, so you can weigh the practical aspects of reading each title.
Reading Time
Estimated reading times vary from 50 minutes for a short catalog to 3,486 minutes for a massive treatise. These estimates help you plan how much time to set aside.
Subject Coverage
Each book lists its subjects, so you can see at a glance whether it touches on inventions, mining, railways, or other topics. This helps you compare the thematic scope of different titles.
Side-by-Side: How Measurable Differences Shape Your Reading
Compare Books lets you put two or three titles next to each other and see word count, estimated reading time, text sections, sentence flow, chapter rhythm, subjects, and page information when available. These numbers are descriptive, not judgments. They help you anticipate the size and shape of a book before you start.
Word Count and Reading Time
Word count and estimated reading time are the most obvious differences. For example, "Petroleum — Themes and Context" (id 275) is 46,095 words, which translates to about 201 minutes of reading. In contrast, "Modern Machine-Shop Practice, Volumes I and II — Reading Companion" (id 250) is a massive 801,590 words, with an estimated reading time of 3,486 minutes. That is a difference of about 755,000 words, or roughly 3,020 pages at 250 words per page. Clearly, one is a weekend project, the other a months-long endeavor.
Even smaller differences matter. A 46,000-word book versus a 61,000-word book, like "Principles of Mining: Valuation, Organization and Administration — Text and Context" (id 224), is about 15,000 words, or 60 pages. That might be a week of reading at 10 pages a day. Knowing this helps you decide which book fits your available time.
Text Sections and Chapter Rhythm
The number of text sections can indicate how the book is structured. "Petroleum" has 6 sections, while "Modern Machine-Shop Practice" has 149 sections. A book with many sections might have shorter chapters, offering more stopping points. For example, if you have limited reading time, a book with 149 sections might allow you to read a complete section in one sitting. In contrast, a book with 6 sections might have long chapters that require longer reading blocks.
Chapter rhythm is relative to this catalog; it is not a quality rating. A 'low' chapter count might mean fewer, longer chapters, while 'high' means more, shorter ones. You can use this to match your reading style. If you prefer to read in small increments, look for books with higher section counts. If you like to settle into a long narrative, lower section counts might be more satisfying.
Sentence Flow and Subjects
Sentence flow, measured by average words per sentence, can affect readability. For instance, "Petroleum" has an average of 30.4 words per sentence, which is on the higher side. "Modern Machine-Shop Practice" has 24.5, and "Principles of Mining" has 20.3. A lower number often means more direct sentences, but it is not a measure of difficulty. It might just indicate a more telegraphic style. You can compare these numbers to see which book's prose you might find more comfortable.
Subjects also differentiate books. "Petroleum" covers petroleum engineering, while "Modern Machine-Shop Practice" covers machinery and machine-shop practice. If you are interested in a specific topic, comparing subjects helps ensure you are choosing a book that covers what you need. The Compare tool does not rate quality; it simply lays out the facts so you can make an informed choice.