Pentagram Revives the Visual Legacy of Science Through “The Hudson Transparencies”

Long before scientific photography made the invisible visible, the only way to reveal microscopic organisms to the public was through the human hand. Armed with paper, paint, pins, and light, English naturalist Charles Thomas Hudson created a remarkable series of illustrations that served as both scientific teaching tools and captivating works of visual art.

That legacy has now been reintroduced to a new generation through The Hudson Transparencies, an exhibition held at Osh Gallery in London earlier this June. Curated by Luke Powell and Jody Hudson-Powell – Pentagram partners and Hudson's great-great-grandsons – the exhibition revives a remarkable form of Victorian scientific visual communication.

Rather than simply presenting historical artifacts behind glass, The Hudson Transparencies recreates how Hudson originally used these images in public lectures. At first glance, the transparencies appear understated, almost unfinished. Yet once illuminated from behind in a darkened room, they transform into dramatic depictions of microscopic life, producing an experience that feels as much theatrical as it does educational.

The exhibition features all 58 original transparencies created by Hudson. Mounted in simple wooden frames covered with brown paper, each piece measures an impressive 96 × 75 centimeters. Organisms that exist at a microscopic scale are enlarged into monumental forms – akin to drawing an ant the size of an elephant.

Each transparency is painstakingly constructed from painted sheets of paper that have been perforated by hand with thousands of tiny pinholes. This intricate process allows light to pass through selected areas, revealing extraordinary detail, texture, and depth once backlit. The result is far more than scientific illustration; it is a compelling fusion of visual experimentation, craftsmanship, and light-based performance.

While a handful of the transparencies depict microscopic plants, the majority explore the animal kingdom. Among them, Rotifera, microscopic organisms commonly known as "wheel-bearing animals", emerge as Hudson's enduring fascination. His curiosity eventually evolved into a lifelong scientific pursuit, leading him to publish numerous research papers and, alongside renowned naturalist Philip Henry Gosse, produce a two-volume monograph that remains one of the nineteenth century's definitive references on rotifers.

For Luke Powell and Jody Hudson-Powell, however, the project extends far beyond rediscovering a family archive. They see Hudson's work as a timeless reflection of the relationship between design, technology, and the communication of knowledge.

"Our practice has always existed at an intersection between function and aesthetics. Never beauty for beauty's sake – nor function to the point of being disengaging, and always looking for a balance in which each supports and enhances the other," says Luke Powell.

To him, Hudson's transparencies occupy a remarkably similar space. They inspire awe by revealing an unseen world, yet they are also highly functional communication tools. That balance between creativity and scientific rigor, between factual observation and visual interpretation, continues to resonate with contemporary design practice.

The brothers' interest in their ancestor's work began rather modestly. Introduced to the collection by their mother, Annie Hudson, they initially shared several images on social media in 2020. The enthusiastic response encouraged them to investigate the archive more deeply, ultimately leading to both the exhibition and an accompanying publication.

Alongside the transparencies themselves, the exhibition includes Hudson's original sketchbook, his family tree, and a selection of supporting archival materials. Coinciding with the exhibition, Pentagram also released the latest edition of Pentagram Paper, bringing together all 58 transparencies in print for the first time. The oversized publication documents not only the finished works but also their intricate construction, accompanied by essays exploring their historical significance and place within visual culture.

For Osh Gallery Program Curator Angus Hyland, The Hudson Transparencies demonstrates that design often emerges in unexpected places. Although originally conceived as scientific presentation tools, Hudson's transparencies reveal how visual communication can bridge knowledge, curiosity, and aesthetic experience simultaneously.

In an age defined by ultra-high-resolution digital imaging and advanced microscopy, Hudson's handcrafted works offer a timely reminder that scientific visualization once relied entirely on human ingenuity. Every line, pinhole, and carefully layered sheet of paper stands as evidence that design has long played a vital role in transforming knowledge into something both understandable and deeply inspiring.