First published in Polish in 1936, this classic work was originally written as a popular scientific book -- one that would present to the educated lay reader a clear picture of certain powerful trends of thought in modern logic. According to the author, these trends sought to create a unified conceptual apparatus as a common basis for the whole of human knowledge.Because these new developments in logical thought tended to perfect and sharpen the deductive method, an indispensable tool in many fields for deriving conclusions from accepted assumptions, the author decided to widen the scope of the work. In subsequent editions he revised the book to make it also a text on which to base an elementary college course in logic and the methodology of deductive sciences. It is this revised edition that is reprinted here.Part One deals with elements of logic and the deductive method, including the use of variables, sentential calculus, theory of identity, theory of classes, theory of relations and the deductive method. The Second Part covers applications of logic and methodology in constructing mathematical theories, including laws of order for numbers, laws of addition and subtraction, methodological considerations on the constructed theory, foundations of arithmetic of real numbers, and more. The author has provided numerous exercises to help students assimilate the material, which not only provides a stimulating and thought-provoking introduction to the fundamentals of logical thought, but is the perfect adjunct to courses in logic and the foundation of mathematics.
ListenBook has revolutionized my audiobook experience. Now I can enjoy my favorite lectures and speeches with ease! The Looping playback and Shuffle features on ListenBook help me customize my listening sessions to my liking. ListenBook Pro's noise reduction feature is a true savior for immersive listening, even in busy surroundings.
📚 Who needs TV when you have this app? Every moment is a storytelling session! 📺🎧 Binaural audio processing is a game-changer – my ears stay comfortable during long listening sessions. The app's performance is nothing short of impressive – smooth, responsive, and designed with audiobook lovers in mind. ListenBook is the best audiobook player I’ve ever used. The app is packed with features like customizable skip intervals, playback speed, and sleep timers. The interface is clean and easy to navigate, making it a joy to use. Five stars!
Integration with Apple CarPlay has made long road trips so much more enjoyable. I can't believe how much time I've saved thanks to this efficient app! 📱 My secret to staying well-read – this app ensures that I'm never without a book, no matter where I am! 📚📱 Library organization has never been this easy. My audiobook collection is finally tidy. The app is very easy to use. ListenBook makes managing my audiobook library simple.
This app has turned audiobook listening into a daily ritual for me. 🧘♀️☕ Unwinding with a cup of tea and a captivating audiobook – relaxation meets intellectual stimulation. 🍵📖 The audio filters to adjust playback speed and volume are a fantastic addition for customizing my experience. A middle-of-the-road audiobook that neither impressed nor disappointed. The narrator's voice was agreeable enough for extended listening, though their character differentiation could have been stronger. The production met basic industry standards without any standout qualities.
My commutes to work have transformed into exciting journeys thanks to this app. ListenBook's customizable features, from playback speed to audio filters, cater to every audiobook lover's preferences. Audiobook multitasking simplified – this app's functionality is a triumph. My house has never been cleaner! I kept finding chores to do just to keep listening. The narrator's energy matched the tone of the book perfectly.
Audiobook journey simplified – this app's functionality is a wonderful surprise. Thanks to ListenBook, downloading audiobooks from various sources has become effortless. Adjustable playback speed and volume control are top-notch.
Plays MP3, MP4, OPUS, OGG, FLAC, AWB, M4B, M4A, WMA, AAC formats
Optimized for iPhone, iPad, and iPod with seamless integration
Adjust playback speed from 0.5x to 3.0x for your listening preference
Import audiobooks via iTunes, cloud services, or direct downloads
Get your favorite audiobooks in supported formats from various sources
Import audiobooks to MP3 Audiobook Player using multiple methods
Control playback from your device, headphones, Apple Watch, or CarPlay
Join thousands of users who enjoy audiobooks with MP3 Audiobook Player daily
Download Now