# Slide & Signal

> Slide & Signal is an independent educational guide to compound microscopy, cell biology, histology study, observation, measurement, and scientific drawing. It helps students build repeatable lab habits without treating classroom images as medical evidence.

Slide & Signal publishes original, long-form guides about microscopy & histology education. Every article opens with a concise direct answer, is structured with clear headings and FAQs, and reflects mainstream expert consensus.

## Microscope Skills

- [Calculate Total Microscope Magnification Correctly](https://stevegallik.org/calculate-total-magnification/): Calculate total visual magnification on a standard compound microscope by multiplying the eyepiece magnification by the active objective magnification.
- [Compound Microscope Parts and What They Control](https://stevegallik.org/compound-microscope-parts-guide/): Identify compound microscope parts by tracing the light path: base and illuminator, condenser and diaphragm, stage and slide controls, objective lenses,…
- [Microscope Field of View: Estimate and Compare](https://stevegallik.org/field-of-view-microscope/): Microscope field of view is the visible specimen area at one optical setup.
- [How to Focus a Compound Microscope Step by Step](https://stevegallik.org/focus-compound-microscope/): Focus a compound microscope by starting with the approved lowest-power objective and loading position, centering the teaching slide over the light path,…
- [Measure Specimens With an Eyepiece Graticule](https://stevegallik.org/measure-specimen-eyepiece-graticule/): Calibrate an eyepiece graticule against the laboratory's specified stage micrometer for every objective used.
- [Microscope Cleaning Guide for Lenses and Stage](https://stevegallik.org/microscope-cleaning-guide/): Clean a microscope only through the model and laboratory procedure.
- [Microscope Illumination and Contrast Without Guessing](https://stevegallik.org/microscope-illumination-contrast/): Adjust microscope illumination after locating the specimen at low power.
- [Microscope Observation Drawing That Records Evidence](https://stevegallik.org/microscope-observation-drawing/): Create a microscope observation drawing by recording the slide, objective, eyepiece, illumination, date, and scale before drawing.
- [Oil Immersion Objective: A Supervised Workflow](https://stevegallik.org/oil-immersion-objective-guide/): Use oil immersion only when the labeled objective, approved prepared slide, specified medium, microscope manual, and supervised laboratory procedure…
- [Wet Mount Slide Guide for Approved Specimens](https://stevegallik.org/wet-mount-slide-guide/): Prepare a wet mount only from an instructor-approved teaching specimen.

## Cells & Tissues

- [Cell Organelles and Functions Without Rote Lists](https://stevegallik.org/cell-organelles-functions-study-guide/): Study cell organelles by connecting each structure to a cellular problem and pathway.
- [Compare Cell Size Under a Microscope Carefully](https://stevegallik.org/compare-cell-size-microscope/): Compare cell size by defining one dimension, calibrating every microscope or image setup, and using the same endpoint and unit rules for all specimens.
- [Connective Tissue Study Guide: Cells and Matrix](https://stevegallik.org/connective-tissue-study-guide/): Identify connective tissue on prepared teaching slides by describing extracellular matrix first, then fiber arrangement, cell distribution, boundaries,…
- [Epithelial Tissue Study Guide for Teaching Slides](https://stevegallik.org/epithelial-tissue-study-guide/): Identify epithelial tissue by locating a continuous lining or covering, evaluating apparent layers, and describing cells at the free surface.
- [Histology Slide Orientation: Find the Big Pattern First](https://stevegallik.org/histology-slide-orientation/): Orient a histology teaching slide by scanning the entire section at low power, marking boundaries, spaces, layers, repeated units, and artifacts.
- [Mitosis Stages Study Guide From Visible Clues](https://stevegallik.org/mitosis-stages-study-guide/): Identify mitosis stages by comparing multiple prepared-slide cells for chromosome condensation, alignment at the cell middle, separation into opposite…
- [Muscle Tissue Study Guide Using Pattern Clues](https://stevegallik.org/muscle-tissue-study-guide/): Identify muscle tissue on prepared teaching slides by determining longitudinal, cross, or oblique section first, then recording fiber shape, visible…
- [Nervous Tissue Study Guide for Prepared Slides](https://stevegallik.org/nervous-tissue-study-guide/): Identify nervous tissue on approved prepared slides by scanning low-power architecture, then recording large cell profiles, smaller surrounding nuclei,…
- [Plant vs Animal Cells Under a Light Microscope](https://stevegallik.org/plant-vs-animal-cells-microscope/): Compare prepared plant and animal cells by scanning multiple fields and recording boundaries, arrangement, resolved internal features, stain, and artifacts.
- [Unknown Teaching Slide Identification Workflow](https://stevegallik.org/unknown-slide-identification-workflow/): Identify an unknown teaching slide by keeping its neutral code, mapping the whole section at low power, and recording architecture and cell patterns…

## Full text for LLMs

- [llms-full.txt](https://stevegallik.org/llms-full.txt): every article as plain markdown in one file
- Each article is also available as markdown at https://stevegallik.org/<slug>.md

## Site

- [About](https://stevegallik.org/about/): editorial approach and standards
- [All articles](https://stevegallik.org/all/)
- [Contact](https://stevegallik.org/contact/)